| Port | Application | Status |
| 1/TCP,UDP | TCP Port Service Multiplexer | Official |
| 2/TCP,UDP | Management Utility | Official |
| 3/TCP,UDP | Compression Process | Official |
| 5/TCP,UDP | Remote Job Entry | Official |
| 7/TCP,UDP | Echo | Official |
| 9/TCP,UDP | Discard | Official |
| 11/TCP,UDP | Active Users | Official |
| 13/TCP,UDP | DAYTIME - (RFC 867) | Official |
| 17/TCP,UDP | Quote of the Day | Official |
| 18/TCP,UDP | Message Send Protocol | Official |
| 19/TCP,UDP | Character Generator | Official |
| 20/TCP | FTP - data | Official |
| 21/TCP | FTP—control (command) | Official |
| 22/TCP,UDP | Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding | Official |
| 23/TCP | Telnet protocol—unencrypted text communications | Official |
| 25/TCP | Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers | Official |
| 35/TCP,UDP | Any private printer server protocol | Official |
| 35/TCP,UDP | QMS Magicolor 2 printer server protocol | Unofficial |
| 37/TCP,UDP | TIME protocol | Official |
| 39/TCP,UDP | Resource Location Protocol[3] (RLP)—used for determining the location of higher level services from hosts on a network | Official |
| 41/TCP,UDP | Graphics | Official |
| 42/TCP,UDP | nameserver, ARPA Host Name Server Protocol | Official |
| 42/TCP,UDP | WINS | Unofficial |
| 43/TCP | WHOIS protocol | Official |
| 49/TCP,UDP | TACACS Login Host protocol | Official |
| 52/TCP,UDP | XNS (Xerox Network Services) Time Protocol | Official |
| 53/TCP,UDP | Domain Name System (DNS) | Official |
| 54/TCP,UDP | XNS (Xerox Network Services) Clearinghouse | Official |
| 56/TCP,UDP | XNS (Xerox Network Services) Authentication | Official |
| 56/TCP,UDP | RAP (Route Access Protocol)[4] | Unofficial |
| 57/TCP | MTP, Mail Transfer Protocol | Unofficial |
| 58/TCP,UDP | XNS (Xerox Network Services) Mail | Official |
| 67/UDP | Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP) | Official |
| 68/UDP | Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP) | Official |
| 69/UDP | Trivial File Transfer Protocol (TFTP) | Official |
| 70/TCP | Gopher protocol | Official |
| 79/TCP | Finger protocol | Official |
| 80/TCP | Hypertext Transfer Protocol (HTTP) | Official |
| 81/TCP | Torpark—Onion routing | Unofficial |
| 82/UDP | Torpark—Control | Unofficial |
| 83/TCP | MIT ML Device | Official |
| 88/TCP | Kerberos—authentication system | Official |
| 90/TCP,UDP | dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map | Official |
| 90/TCP,UDP | Pointcast | Unofficial |
| 101/TCP | NIC host name | Official |
| 102/TCP | ISO-TSAP (Transport Service Access Point) Class 0 protocol[5] | Official |
| 104/TCP,UDP | ACR/NEMA Digital Imaging and Communications in Medicine | Official |
| 107/TCP | Remote TELNET Service[6] protocol | Official |
| 109/TCP | Post Office Protocol 2 (POP2) | Official |
| 110/TCP | Post Office Protocol 3 (POP3) | Official |
| 111/TCP,UDP | Sun Remote Procedure Call | Official |
| 113/UDP | ident—old user identification system, still used by IRC servers to identify users | Official |
| 113/TCP,UDP | Authentication Service (auth) | Official |
| 115/TCP | Simple File Transfer Protocol (SFTP) | Official |
| 117/TCP | UUCP Path Service | Official |
| 118/TCP,UDP | SQL (Structured Query Language) Services | Official |
| 119/TCP | Network News Transfer Protocol (NNTP)—used for retrieving newsgroup messages | Official |
| 123/UDP | Network Time Protocol (NTP)—used for time synchronization | Official |
| 135/TCP,UDP | DCE endpoint resolution | Official |
| 135/TCP,UDP | Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service[7], used to remotely manage services including DHCP server, DNS server and WINS | Unofficial |
| 137/TCP,UDP | NetBIOS NetBIOS Name Service | Official |
| 138/TCP,UDP | NetBIOS NetBIOS Datagram Service | Official |
| 139/TCP,UDP | NetBIOS NetBIOS Session Service | Official |
| 143/TCP,UDP | Internet Message Access Protocol (IMAP)—used for retrieving, organizing, and synchronizing e-mail messages | Official |
| 152/TCP,UDP | Background File Transfer Program (BFTP)[8] | Official |
| 153/TCP,UDP | SGMP, Simple Gateway Monitoring Protocol | Official |
| 156/TCP,UDP | SQL Service | Official |
| 158/TCP,UDP | DMSP, Distributed Mail Service Protocol | Unofficial |
| 161/TCP,UDP | Simple Network Management Protocol (SNMP) | Official |
| 162/TCP,UDP | Simple Network Management Protocol Trap (SNMPTRAP)[9] | Official |
| 170/TCP | Print-srv, Network PostScript | Official |
| 177/TCP,UDP | X Display Manager Control Protocol (XDMCP) | Official |
| 179/TCP | BGP (Border Gateway Protocol) | Official |
| 194/UDP | IRC (Internet Relay Chat) | Official |
| 201/TCP,UDP | AppleTalk Routing Maintenance | Official |
| 209/TCP,UDP | The Quick Mail Transfer Protocol | Official |
| 213/TCP,UDP | IPX | Official |
| 218/TCP,UDP | MPP, Message Posting Protocol | Official |
| 220/TCP,UDP | IMAP, Interactive Mail Access Protocol, version 3 | Official |
| 259/TCP,UDP | ESRO, Efficient Short Remote Operations | Official |
| 264/TCP,UDP | BGMP, Border Gateway Multicast Protocol | Official |
| 311/TCP | Mac OS X Server Admin (officially AppleShare IP Web admistration) | Official |
| 308/TCP | Novastor Online Backup | Official |
| 318/TCP,UDP | PKIX TSP, Time Stamp Protocol | Official |
| 323/TCP,UDP | IMMP, Internet Message Mapping Protocol | Unofficial |
| 350/TCP,UDP | MATIP-Type A, Mapping of Airline Traffic over Internet Protocol | Official |
| 351/TCP,UDP | MATIP-Type B, Mapping of Airline Traffic over Internet Protocol | Official |
| 366/TCP,UDP | ODMR, On-Demand Mail Relay | Official |
| 369/TCP,UDP | Rpc2portmap | Official |
| 371/TCP,UDP | ClearCase albd | Official |
| 383/TCP,UDP | HP data alarm manager | Official |
| 384/TCP,UDP | A Remote Network Server System | Official |
| 387/TCP,UDP | AURP, AppleTalk Update-based Routing Protocol | Official |
| 389/TCP,UDP | Lightweight Directory Access Protocol (LDAP) | Official |
| 401/TCP,UDP | UPS Uninterruptible Power Supply | Official |
| 402/TCP | Altiris, Altiris Deployment Client | Unofficial |
| 411/TCP | Direct Connect Hub | Unofficial |
| 412/TCP | Direct Connect Client-to-Client | Unofficial |
| 427/TCP,UDP | Service Location Protocol (SLP) | Official |
| 443/TCP,UDP | Hypertext Transfer Protocol over TLS/SSL (HTTPS) | Official |
| 444/TCP,UDP | SNPP, Simple Network Paging Protocol (RFC 1568) | Official |
| 445/TCP | Microsoft-DS Active Directory, Windows shares | Official |
| 445/UDP | Microsoft-DS SMB file sharing | Official |
| 464/TCP,UDP | Kerberos Change/Set password | Official |
| 465/TCP | Cisco protocol | Unofficial |
| 465/TCP | SMTP over SSL | Unofficial |
| 475/TCP | tcpnethaspsrv (Hasp services, TCP/IP version) | Official |
| 497/TCP | Dantz Retrospect | Official |
| 500/UDP | Internet Security Association and Key Management Protocol (ISAKMP) | Official |
| 502/TCP,UDP | Modbus, Protocol | Unofficial |
| 504/TCP,UDP | Citadel - multiservice protocol for dedicated clients for the Citadel groupware system | Official |
| 510/TCP | First Class Protocol | Unofficial |
| 512/TCP | Rexec, Remote Process Execution | Official |
| 512/UDP | comsat, together with biff | Official |
| 513/TCP | Login | Official |
| 513/UDP | Who | Official |
| 514/TCP | Shell—used to execute non-interactive commands on a remote system | Official |
| 514/UDP | Syslog—used for system logging | Official |
| 515/TCP | Line Printer Daemon—print service | Official |
| 517/UDP | Talk | Official |
| 518/UDP | NTalk | Official |
| 520/TCP | efs, extended file name server | Official |
| 520/UDP | Routing—RIP | Official |
| 524/TCP,UDP | NCP (NetWare Core Protocol) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc. | Official |
| 525/UDP | Timed, Timeserver | Official |
| 530/TCP,UDP | RPC | Official |
| 531/TCP,UDP | AOL Instant Messenger, IRC | Unofficial |
| 532/TCP | netnews | Official |
| 533/UDP | netwall, For Emergency Broadcasts | Official |
| 540/TCP | UUCP (Unix-to-Unix Copy Protocol) | Official |
| 542/TCP,UDP | commerce (Commerce Applications) | Official |
| 543/TCP | klogin, Kerberos login | Official |
| 544/TCP | kshell, Kerberos Remote shell | Official |
| 546/TCP,UDP | DHCPv6 client | Official |
| 547/TCP,UDP | DHCPv6 server | Official |
| 548/TCP | Apple Filing Protocol (AFP) over TCP | Official |
| 550/UDP | new-rwho, new-who | Official |
| 554/TCP,UDP | Real Time Streaming Protocol (RTSP) | Official |
| 556/TCP | Remotefs, RFS, rfs_server | Official |
| 560/UDP | rmonitor, Remote Monitor | Official |
| 561/UDP | monitor | Official |
| 563/TCP,UDP | NNTP protocol over TLS/SSL (NNTPS) | Official |
| 587/TCP | e-mail message submission[10] (SMTP) | Official |
| 591/TCP | FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80) | Official |
| 593/TCP,UDP | HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server | Official |
| 604/TCP | TUNNEL profile[11], a protocol for BEEP peers to form an application layer tunnel | Official |
| 623/UDP | ASF Remote Management and Control Protocol</ref> (ASF-RMCP) | Official |
| 631/TCP,UDP | Internet Printing Protocol (IPP) | Official |
| 636/TCP,UDP | Lightweight Directory Access Protocol over TLS/SSL (LDAPS) | Official |
| 639/TCP,UDP | MSDP, Multicast Source Discovery Protocol | Official |
| 646/TCP,UDP | LDP, Label Distribution Protocol, a routing protocol used in MPLS networks | Official |
| 647/TCP | DHCP Failover protocol[12] | Official |
| 648/TCP | RRP (Registry Registrar Protocol)[13] | Official |
| 652/TCP | DTCP, Dynamic Tunnel Configuration Protocol | Unofficial |
| 654/TCP | AODV (Ad-hoc On-demand Distance Vector) | Official |
| 655/TCP | IEEE MMS (IEEE Media Management System)[14][15] | Official |
| 657/TCP,UDP | IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[16] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration | Official |
| 660/TCP | Mac OS X Server administration | Official |
| 665/TCP | sun-dr, Remote Dynamic Reconfiguration | Unofficial |
| 666/UDP | Doom, first online first-person shooter | Official |
| 674/TCP | ACAP (Application Configuration Access Protocol) | Official |
| 691/TCP | MS Exchange Routing | Official |
| 692/TCP | Hyperwave-ISP | Official |
| 694/UDP | Linux-HA High availability Heartbeat | Unofficial |
| 695/TCP | IEEE-MMS-SSL (IEEE Media Management System over SSL)[17] | Official |
| 698/UDP | OLSR (Optimized Link State Routing) | Official |
| 699/TCP | Access Network | Official |
| 700/TCP | EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 4934) | Official |
| 701/TCP | LMP (Link Management Protocol (Internet))[18], a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links | Official |
| 702/TCP | IRIS[19][20] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[21] (RFC 3983) | Official |
| 706/TCP | SILC, Secure Internet Live Conferencing | Official |
| 711/TCP | Cisco TDP, Tag Distribution Protocol[22][23][24]—being replaced by the MPLS Label Distribution Protocol[25] | Official |
| 712/TCP | TBRPF, Topology Broadcast based on Reverse-Path Forwarding routing protocol (RFC 3684) | Official |
| 712/UDP | Promise RAID Controller | Unofficial |
| 720/TCP | SMQP, Simple Message Queue Protocol | Unofficial |
| 749/TCP,UDP | Kerberos administration | Official |
| 750/TCP | rfile | Official |
| 750/UDP | loadav | Official |
| 750/UDP | kerberos-iv, Kerberos version IV | Official |
| 751/TCP,UDP | pump | Official |
| 751/TCP,UDP | kerberos_master, Kerberos authentication | Unofficial |
| 752/TCP | qrh | Official |
| 752/UDP | qrh | Official |
| 752/UDP | userreg_server, Kerberos Password (kpasswd) server | Unofficial |
| 753/TCP | Reverse Routing Header (rrh)[26] | Official |
| 753/UDP | Reverse Routing Header (rrh) | Official |
| 753/UDP | passwd_server, Kerberos userreg server | Unofficial |
| 754/TCP | tell send | Official |
| 754/TCP | krb5_prop, Kerberos v5 slave propagation | Unofficial |
| 754/UDP | tell send | Official |
| 760/TCP,UDP | ns | Official |
| 760/TCP,UDP | krbupdate [kreg], Kerberos registration | Unofficial |
| 782/TCP | Conserver serial-console management server | Unofficial |
| 783/TCP | SpamAssassin spamd daemon | Unofficial |
| 829/TCP | CMP (Certificate Management Protocol) | Unofficial |
| 843/TCP | Adobe Flash socket policy server | Unofficial |
| 860/TCP | iSCSI (RFC 3720) | Official |
| 873/TCP | rsync file synchronisation protocol | Official |
| 888/TCP | cddbp, CD DataBase (CDDB) protocol (CDDBP)—unassigned but widespread use | Unofficial |
| 901/TCP | Samba Web Administration Tool (SWAT) | Unofficial |
| 901/TCP, UDP | VMware Virtual Infrastructure Client (UDP from server being managed to management console) | Unofficial |
| 902/TCP | VMware Server Console (TCP from management console to server being Managed) | Unofficial |
| 904/TCP | VMware Server Alternate (if 902 is in use, i.e. SUSE linux) | Unofficial |
| 911/TCP | Network Console on Acid (NCA)—local tty redirection over OpenSSH | Unofficial |
| 953/TCP,UDP | Domain Name System (DNS) RDNC Service | Official |
| 981/TCP | SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software | Unofficial |
| 989/TCP,UDP | FTPS Protocol (data): FTP over TLS/SSL | Official |
| 990/TCP,UDP | FTPS Protocol (control): FTP over TLS/SSL | Official |
| 991/TCP,UDP | NAS (Netnews Administration System) | Official |
| 992/TCP,UDP | TELNET protocol over TLS/SSL | Official |
| 993/TCP | Internet Message Access Protocol over SSL (IMAPS) | Official |
| 995/TCP | Post Office Protocol 3 over TLS/SSL (POP3S) | Official |
| 999/TCP | ScimoreDB Database System | Unofficial |
| 1023/TCP,UDP | Reserved[1] | Official |
| Port | Description | Status |
| 1024/TCP,UDP | Reserved[1] | Official |
| 1025/TCP | NFS-or-IIS | Unofficial |
| 1026/TCP | Often utilized by Microsoft DCOM services | Unofficial |
| 1029/TCP | Often utilized by Microsoft DCOM services | Unofficial |
| 1058/TCP,UDP | nim, IBM AIX Network Installation Manager (NIM) | Official |
| 1059/TCP,UDP | nimreg, IBM AIX Network Installation Manager (NIM) | Official |
| 1080/TCP | SOCKS proxy | Official |
| 1085/TCP,UDP | WebObjects | Official |
| 1098/TCP,UDP | rmiactivation, RMI Activation | Official |
| 1099/TCP,UDP | rmiregistry, RMI Registry | Official |
| 1109/TCP,UDP | Reserved[1] | Official |
| 1109/TCP | Kerberos Post Office Protocol (KPOP) | Unofficial |
| 1111/UDP | EasyBits School network discovery protocol (for Intel's CMPC platform) | Unofficial |
| 1140/TCP,UDP | AutoNOC protocol | Official |
| 1167/UDP | phone, conference calling | Unofficial |
| 1169/TCP,UDP | Tripwire | Official |
| 1176/TCP | Perceptive Automation Indigo Home automation server | Official |
| 1182/TCP,UDP | AcceleNet Intelligent Transfer Protocol | Official |
| 1194/TCP,UDP | OpenVPN | Official |
| 1198/TCP,UDP | The cajo project Free dynamic transparent distributed computing in Java | Official |
| 1200/TCP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request[27] | Official |
| 1200/UDP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request | Official |
| 1200/UDP | Steam Friends Applet | Unofficial |
| 1214/TCP | Kazaa | Official |
| 1220/TCP | QuickTime Streaming Server administration | Official |
| 1223/TCP,UDP | TGP, TrulyGlobal Protocol, also known as "The Gur Protocol" (named for Gur Kimchi of TrulyGlobal) | Official |
| 1234/UDP | VLC media player Default port for UDP/RTP stream | Unofficial |
| 1236/TCP | Symantec BindView Control UNIX Default port for TCP management server connections | Unofficial |
| 1241/TCP,UDP | Nessus Security Scanner | Official |
| 1248/TCP | NSClient/NSClient++/NC_Net (Nagios) | Unofficial |
| 1270/TCP,UDP | Microsoft System Center Operations Manager (SCOM) (formerly Microsoft Operations Manager (MOM)) agent | Official |
| 1293/TCP,UDP | IPSec (Internet Protocol Security) | Official |
| 1311/TCP | Dell Open Manage HTTPS | Unofficial |
| 1313/TCP | Xbiim (Canvii server) | Unofficial |
| 1337/TCP | PowerFolder P2P Encrypted File Synchronization Program | Unofficial |
| 1337/TCP | WASTE Encrypted File Sharing Program | Unofficial |
| 1352/TCP | IBM Lotus Notes/Domino Remote Procedure Call (RPC) protocol | Official |
| 1387/TCP,UDP | cadsi-lm, LMS International (formerly Computer Aided Design Software, Inc. (CADSI)) LM | Official |
| 1414/TCP | IBM WebSphere MQ (formerly known as MQSeries) | Official |
| 1417/TCP,UDP | Timbuktu Service 1 Port | Official |
| 1418/TCP,UDP | Timbuktu Service 2 Port | Official |
| 1419/TCP,UDP | Timbuktu Service 3 Port | Official |
| 1420/TCP,UDP | Timbuktu Service 4 Port | Official |
| 1431/TCP | Reverse Gossip Transport Protocol (RGTP), used to access a General-purpose Reverse-Ordered Gossip Gathering System (GROGGS) bulletin board, such as that implemented on the Cambridge University's Phoenix system | Official |
| 1433/TCP | Microsoft SQL Server database management system Server | Official |
| 1434/UDP | Microsoft SQL Server database management system Monitor | Official |
| 1494/TCP | Citrix XenApp Independent Computing Architecture (ICA) thin client protocol | Official |
| 1500/TCP | NetGuard GuardianPro firewall (NT4-based) Remote Management | Unofficial |
| 1501/UDP | NetGuard GuardianPro firewall (NT4-based) Authentication Client | Unofficial |
| 1503/TCP,UDP | Windows Live Messenger (Whiteboard and Application Sharing) | Unofficial |
| 1512/TCP,UDP | Microsoft Windows Internet Name Service (WINS) | Official |
| 1521/TCP | nCube License Manager | Official |
| 1521/TCP | Oracle database default listener, in future releases official port 2483 | Unofficial |
| 1524/TCP,UDP | ingreslock, ingres | Official |
| 1526/TCP | Oracle database common alternative for listener | Unofficial |
| 1533/TCP | IBM Sametime IM—Virtual Places Chat Microsoft SQL Server | Official |
| 1547/TCP,UDP | Laplink | Official |
| 1550 | Gadu-Gadu (direct client-to-client) | Unofficial |
| 1581/UDP | MIL STD 2045-47001 VMF | Official |
| 1589/UDP | Cisco VQP (VLAN Query Protocol) / VMPS | Unofficial |
| 1645/TCP,UDP | radius, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers) | Unofficial |
| 1646/TCP,UDP | radacct, RADIUS accounting protocol (default for Cisco and Juniper Networks RADIUS servers) | Unofficial |
| 1627 | iSketch | Unofficial |
| 1677/TCP,UDP | Novell GroupWise clients in client/server access mode | Official |
| 1701/UDP | Layer 2 Forwarding Protocol (L2F) & Layer 2 Tunneling Protocol (L2TP) | Official |
| 1716/TCP | America's Army Massively multiplayer online role-playing game (MMORPG) | Unofficial |
| 1723/TCP,UDP | Microsoft Point-to-Point Tunneling Protocol (PPTP) | Official |
| 1725/UDP | Valve Steam Client | Unofficial |
| 1755/TCP,UDP | Microsoft Media Services (MMS, ms-streaming) | Official |
| 1761/TCP,UDP | cft-0 | Official |
| 1761/TCP | Novell Zenworks Remote Control utility | Unofficial |
| 1762–1768/TCP,UDP | cft-1 to cft-7 | Official |
| 1812/TCP,UDP | radius, RADIUS authentication protocol | Official |
| 1813/TCP,UDP | radacct, RADIUS accounting protocol | Official |
| 1863/TCP | MSNP (Microsoft Notification Protocol), used by the .NET Messenger Service and a number of Instant Messaging clients | Official |
| 1900/UDP | Microsoft SSDP Enables discovery of UPnP devices | Official |
| 1920/TCP | IBM Tivoli Monitoring Console (https) | Unofficial |
| 1935/TCP | Adobe Systems Macromedia Flash Real Time Messaging Protocol (RTMP) "plain" protocol | Official |
| 1970/TCP,UDP | Danware NetOp Remote Control | Official |
| 1971/TCP,UDP | Danware NetOp School | Official |
| 1972/TCP,UDP | InterSystems Caché | Official |
| 1975–1977/UDP | Cisco TCO (Documentation) | Official |
| 1984/TCP | Big Brother—network monitoring tool | Official |
| 1985/UDP | Cisco HSRP | Official |
| 1994/TCP,UDP | Cisco STUN-SDLC (Serial Tunneling—Synchronous Data Link Control) protocol | Official |
| 1998/TCP,UDP | Cisco X.25 over TCP (XOT) service | Official |
| 2000/TCP,UDP | Cisco SCCP (Skinny) | Official |
| 2001/UDP | CAPTAN Test Stand System | Unofficial |
| 2002/TCP | Secure Access Control Server (ACS) for Windows | Unofficial |
| 2030 | Oracle Services for Microsoft Transaction Server | Unofficial |
| 2031/TCP,UDP | mobrien-chat—obsolete (ex-http://www.mobrien.com) | Official |
| 2041/TCP | Mail.Ru Agent communication protocol | Unofficial |
| 2049/UDP | Network File System | Official |
| 2049/UDP | shilp | Official |
| 2053/UDP | lot105-ds-upd Lot105 DSuper Updates | Official |
| 2053/TCP | lot105-ds-upd Lot105 DSuper Updates | Official |
| 2053/TCP | knetd Kerberos de-multiplexor | Unofficial |
| 2056/UDP | Civilization 4 multiplayer | Unofficial |
| 2073/TCP,UDP | DataReel Database | Official |
| 2074/TCP,UDP | Vertel VMF SA (i.e. App.. SpeakFreely) | Official |
| 2082/TCP | Infowave Mobility Server | Official |
| 2082/TCP | CPanel default | Unofficial |
| 2083/TCP | Secure Radius Service (radsec) | Official |
| 2083/TCP | CPanel default SSL | Unofficial |
| 2086/TCP | GNUnet | Official |
| 2086/TCP | WebHost Manager default | Unofficial |
| 2087/TCP | WebHost Manager default SSL | Unofficial |
| 2095/TCP | CPanel default Web mail | Unofficial |
| 2096/TCP | CPanel default SSL Web mail | Unofficial |
| 2102/TCP,UDP | zephyr-srv Project Athena Zephyr Notification Service server | Official |
| 2103/TCP,UDP | zephyr-clt Project Athena Zephyr Notification Service serv-hm connection | Official |
| 2104/TCP,UDP | zephyr-hm Project Athena Zephyr Notification Service hostmanager | Official |
| 2105/TCP,UDP | IBM MiniPay | Official |
| 2105/TCP,UDP | eklogin Kerberos encrypted remote login (rlogin) | Unofficial |
| 2105/TCP,UDP | zephyr-hm-srv Project Athena Zephyr Notification Service hm-serv connection (should use port 2102) | Unofficial |
| 2144/TCP | Iron Mountain LiveVault Agent | UnOfficial |
| 2145/TCP | Iron Mountain LiveVault Agent | UnOfficial |
| 2161/TCP | APC Agent | Official |
| 2181/TCP,UDP | EForward-document transport system | Official |
| 2190/UDP | TiVoConnect Beacon | Unofficial |
| 2200/UDP | Tuxanci game server[28] | Unofficial |
| 2219/TCP,UDP | NetIQ NCAP Protocol | Official |
| 2220/TCP,UDP | NetIQ End2End | Official |
| 2222/TCP | DirectAdmin default | Unofficial |
| 2222/UDP | Microsoft Office OS X antipiracy network monitor [1] | Unofficial |
| 2301/TCP | HP System Management Redirect to port 2381 | Unofficial |
| 2302/UDP | ArmA multiplayer (default for game) | Unofficial |
| 2302/UDP | Halo: Combat Evolved multiplayer | Unofficial |
| 2303/UDP | ArmA multiplayer (default for server reporting) (default port for game +1) | Unofficial |
| 2305/UDP | ArmA multiplayer (default for VoN) (default port for game +3) | Unofficial |
| 2369/TCP | Default for BMC Software CONTROL-M/Server—Configuration Agent, though often changed during installation | Official |
| 2370/TCP | Default for BMC Software CONTROL-M/Server—to allow the CONTROL-M/Enterprise Manager to connect to the CONTROL-M/Server, though often changed during installation | Official |
| 2381/TCP | HP Insight Manager default for Web server | Unofficial |
| 2401/TCP | CVS version control system | Unofficial |
| 2404/TCP | IEC 60870-5-104, used to send electric power telecontrol messages between two systems via directly connected data circuits | Official |
| 2420/UDP | Westell Remote Access | Official |
| 2427/UDP | Cisco MGCP | Official |
| 2447/TCP,UDP | ovwdb—OpenView Network Node Manager (NNM) daemon | Official |
| 2483/TCP,UDP | Oracle database listening for unsecure client connections to the listener, replaces port 1521 | Official |
| 2484/TCP,UDP | Oracle database listening for SSL client connections to the listener | Official |
| 2546/TCP,UDP | EVault—Data Protection Services | Unofficial |
| 2593/TCP,UDP | RunUO—Ultima Online server | Unofficial |
| 2598/TCP | new ICA—when Session Reliability is enabled, TCP port 2598 replaces port 1494 | Unofficial |
| 2612/TCP,UDP | QPasa from MQSoftware | Official |
| 2700-2800/TCP | KnowShowGo P2P | Official |
| 2710/TCP | XBT Bittorrent Tracker | Unofficial |
| 2710/UDP | XBT Bittorrent Tracker experimental UDP tracker extension | Unofficial |
| 2710/TCP | Knuddels.de | Unofficial |
| 2735/TCP,UDP | NetIQ Monitor Console | Official |
| 2809/TCP | corbaloc:iiop URL, per the CORBA 3.0.3 specification | Official |
| 2809/TCP | IBM WebSphere Application Server (WAS) Bootstrap/rmi default | Unofficial |
| 2809/UDP | corbaloc:iiop URL, per the CORBA 3.0.3 specification. | Official |
| 2944/UDP | Megaco Text H.248 | Unofficial |
| 2945/UDP | Megaco Binary (ASN.1) H.248 | Unofficial |
| 2948/TCP,UDP | WAP-push Multimedia Messaging Service (MMS) | Official |
| 2949/TCP,UDP | WAP-pushsecure Multimedia Messaging Service (MMS) | Official |
| 2967/TCP | Symantec AntiVirus Corporate Edition | Unofficial |
| 3000/TCP | Miralix License server | Unofficial |
| 3000/UDP | Distributed Interactive Simulation (DIS), modifiable default | Unofficial |
| 3001/TCP | Miralix Phone Monitor | Unofficial |
| 3002/TCP | Miralix CSTA | Unofficial |
| 3003/TCP | Miralix GreenBox API | Unofficial |
| 3004/TCP | Miralix InfoLink | Unofficial |
| 3006/TCP | Miralix SMS Client Connector | Unofficial |
| 3007/TCP | Miralix OM Server | Unofficial |
| 3025/TCP | netpd.org | Unofficial |
| 3030/TCP,UDP | NetPanzer | Unofficial |
| 3050/TCP,UDP | gds_db (Interbase/Firebird) | Official |
| 3051/TCP | AMS (Agency Management System) | Unofficial |
| 3074/TCP,UDP | Xbox LIVE and/or Games for Windows - LIVE | Official |
| 3128/TCP | HTTP used by Web caches and the default for the Squid cache | Unofficial |
| 3225/TCP,UDP | FCIP (Fiber Channel over Internet Protocol) | Official |
| 3233/TCP,UDP | WhiskerControl research control protocol | Official |
| 3260/TCP,UDP | iSCSI target | Official |
| 3268/TCP,UDP | msft-gc, Microsoft Global Catalog (LDAP service which contains data from Active Directory forests) | Official |
| 3269/TCP,UDP | msft-gc-ssl, Microsoft Global Catalog over SSL (similar to port 3268, LDAP over SSL) | Official |
| 3283/TCP | Apple Remote Desktop reporting (officially Net Assistant, referring to an earlier product) | Official |
| 3300/TCP | TripleA game server | Unofficial |
| 3305/TCP,UDP | odette-ftp, Odette File Transfer Protocol (OFTP) | Official |
| 3306/TCP,UDP | MySQL database system | Official |
| 3333/TCP | Network Caller ID server | Unofficial |
| 3386/TCP,UDP | GTP' 3GPP GSM/UMTS CDR logging protocol | Official |
| 3389/TCP | Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT) | Official |
| 3396/TCP,UDP | Novell NDPS Printer Agent | Official |
| 3455/TCP,UDP | [RSVP] Reservation Protocol | Official |
| 3423/TCP | Xware xTrm Communication Protocol | Official |
| 3424/TCP | Xware xTrm Communication Protocol over SSL | Official |
| 3483/UDP | Slim Devices discovery protocol | Official |
| 3483/TCP | Slim Devices SlimProto protocol | Official |
| 3544/UDP | Teredo tunneling | Unofficial |
| 3632/TCP | distributed compiler | Official |
| 3689/TCP | Digital Audio Access Protocol (DAAP)—used by Apple’s iTunes and AirPort Express | Official |
| 3690/TCP,UDP | Subversion version control system | Official |
| 3702/TCP,UDP | Web Services Dynamic Discovery (WS-Discovery), used by various components of Windows Vista | Official |
| 3723/TCP,UDP | Used by many Battle.net Blizzard games (Diablo II, Warcraft II, Warcraft III, StarCraft) | Unofficial |
| 3724/TCP,UDP | World of Warcraft Online gaming MMORPG | Unofficial |
| 3724/TCP | Club Penguin Disney online game for kids | Unofficial |
| 3784/TCP,UDP | Ventrilo VoIP program used by Ventrilo | Unofficial |
| 3785/UDP | Ventrilo VoIP program used by Ventrilo | Unofficial |
| 3868/TCP,SCTP | Diameter base protocol (RFC 3588) | Official |
| 3872/TCP | Oracle Management Remote Agent | Unofficial |
| 3899/TCP | Remote Administrator | Unofficial |
| 3900/TCP | udt_os, IBM UniData UDT OS[29] | Official |
| 3945/TCP,UDP | EMCADS service, a Giritech product used by G/On | Official |
| 3978/UDP | OpenTTD game serverlist masterserver | Unofficial |
| 3979/TCP,UDP | OpenTTD game | Unofficial |
| 4000/TCP,UDP | Diablo II game | Unofficial |
| 4007/TCP | PrintBuzzer printer monitoring socket server | Unofficial |
| 4018/TCP,UDP | Unknown | Official |
| 4069/UDP | Minger Email Address Verification Protocol[30] | Official |
| 4089/TCP,UDP | OpenCORE Remote Control Service | Official |
| 4093/TCP,UDP | PxPlus Client server interface ProvideX | Official |
| 4096/TCP,UDP | Bridge-Relay Element ASCOM | Official |
| 4100 | WatchGuard Authentication Applet—default | Unofficial |
| 4111/TCP | Xgrid | Official |
| 4125/TCP | Microsoft Remote Web Workplace administration | Unofficial |
| 4226/TCP,UDP | Aleph One (game) | Unofficial |
| 4224/TCP | Cisco CDP Cisco discovery Protocol | Unofficial |
| 4500/UDP | IPSec NAT Traversal (RFC 3947) | Official |
| 4534/UDP | Armagetron Advanced default server port | Unofficial |
| 4569/UDP | Inter-Asterisk eXchange | Unofficial |
| 4610-4640/TCP | QualiSystems TestShell Suite Services | Unofficial |
| 4662/TCP,UDP | OrbitNet Message Service | Official |
| 4662/TCP | often used by eMule | Unofficial |
| 4664/TCP | Google Desktop Search | Unofficial |
| 4664/TCP | Default for Unica's Campaign Listener, though often changed during installation | Unofficial |
| 4672/UDP | eMule—often used | Unofficial |
| 4747/TCP | Apprentice | Unofficial |
| 4750/TCP | BladeLogic Agent | Unofficial |
| 4840/TCP,UDP | OPC UA TCP Protocol for OPC Unified Architecture from OPC Foundation | Official |
| 4843/TCP,UDP | OPC UA TCP Protocol over TLS/SSL for OPC Unified Architecture from OPC Foundation | Official |
| 4847/TCP,UDP | Web Fresh Communication, Quadrion Software & Odorless Entertainment | Official |
| 4993/TCP,UDP | Home FTP Server web Interface Default Port | |
| 4894/TCP,UDP | LysKOM Protocol A | Official |
| 4899/TCP,UDP | Radmin remote administration tool (program sometimes used by a Trojan horse) | Official |
| 5000/TCP | commplex-main | Official |
| 5000/TCP | UPnP—Windows network device interoperability | Unofficial |
| 5000/TCP,UDP | VTun—VPN Software | Unofficial |
| 5001/TCP | commplex-link | Official |
| 5001/TCP,UDP | Iperf (Tool for measuring TCP and UDP bandwidth performance) | Unofficial |
| 5001/TCP | Slingbox and Slingplayer | Unofficial |
| 5003/TCP,UDP | FileMaker | Official |
| 5004/TCP,UDP,DCCP | RTP (Real-time Transport Protocol) media data (RFC 3551, RFC 4571) | Official |
| 5005/TCP,UDP,DCCP | RTP (Real-time Transport Protocol) control protocol (RFC 3551, RFC 4571) | Official |
| 5031/TCP,UDP | AVM CAPI-over-TCP (ISDN over Ethernet tunneling) | Unofficial |
| 5050/TCP | Yahoo! Messenger | Unofficial |
| 5051/TCP | ita-agent Symantec Intruder Alert[31] | Official |
| 5060/TCP,UDP | Session Initiation Protocol (SIP) | Official |
| 5061/TCP | Session Initiation Protocol (SIP) over TLS | Official |
| 5093/UDP | SPSS (Statistical Package for the Social Sciences) License Administrator | Unofficial |
| 5104/TCP | IBM Tivoli Framework NetCOOL/Impact[32] HTTP Service | Unofficial |
| 5106/TCP | A-Talk Common connection | Unofficial |
| 5107/TCP | A-Talk Remote server connection | Unofficial |
| 5110/TCP | ProRat Server | Unofficial |
| 5121/TCP | Neverwinter Nights | Unofficial |
| 5154/TCP,UDP | Bzflag | Official |
| 5176/TCP | ConsoleWorks default UI interface | Unofficial |
| 5190/TCP | ICQ and AOL Instant Messenger | Official |
| 5222/TCP | Extensible Messaging and Presence Protocol (XMPP, Jabber) client connection (RFC 3920) | Official |
| 5223/TCP | Extensible Messaging and Presence Protocol (XMPP, Jabber) client connection over SSL | Unofficial |
| 5269/TCP | Extensible Messaging and Presence Protocol (XMPP, Jabber) server connection (RFC 3920) | Official |
| 5298/TCP,UDP | Extensible Messaging and Presence Protocol (XMPP) link-local messaging | Official |
| 5351/TCP,UDP | NAT Port Mapping Protocol—client-requested configuration for inbound connections through network address translators | Official |
| 5353/UDP | Multicast DNS (MDNS) | Official |
| 5355/TCP,UDP | LLMNR—Link-Local Multicast Name Resolution, allows hosts to perform name resolution for hosts on the same local link (only provided by Windows Vista and Server 2008) | Official |
| 5402/TCP,UDP | mftp, Stratacache OmniCast content delivery system MFTP file sharing protocol | Official |
| 5405/TCP,UDP | NetSupport | Official |
| 5421/TCP,UDP | Net Support 2 | Official |
| 5432/TCP,UDP | PostgreSQL database system | Official |
| 5445/UDP | Cisco Unified Video Advantage | Unofficial |
| 5495/TCP | Applix TM1 Admin server | Unofficial |
| 5498/TCP | Hotline tracker server connection | Unofficial |
| 5499/UDP | Hotline tracker server discovery | Unofficial |
| 5500/TCP | VNC remote desktop protocol—for incoming listening viewer, Hotline control connection | Unofficial |
| 5501/TCP | Hotline file transfer connection | Unofficial |
| 5517/TCP | Setiqueue Proxy server client for SETI@Home project | Unofficial |
| 5555/TCP | Freeciv versions up to 2.0, Hewlett Packard Data Protector, SAP | Unofficial |
| 5556/TCP,UDP | Freeciv | Official |
| 5631/TCP | pcANYWHEREdata, Symantec pcAnywhere (version 7.52 and later[33])[34] data | Official |
| 5632/UDP | pcANYWHEREstat, Symantec pcAnywhere (version 7.52 and later) status | Official |
| 5666/TCP | NRPE (Nagios) | Unofficial |
| 5667/TCP | NSCA (Nagios) | Unofficial |
| 5723/TCP | Operations Manager | Unofficial |
| 5800/TCP | VNC remote desktop protocol—for use over HTTP | Unofficial |
| 5814/TCP,UDP | Hewlett-Packard Support Automation (HP OpenView Self-Healing Services) | Official |
| 5850/TCP | COMIT SE (PCR) | Unofficial |
| 5852/TCP | Adeona client: communications to OpenDHT | Unofficial |
| 5900/TCP,UDP | Virtual Network Computing (VNC) remote desktop protocol (used by Apple Remote Desktop and others) | Official |
| 5938/TCP,UDP | TeamViewer[35] remote desktop protocol | Unofficial |
| 5984/TCP,UDP | CouchDB database server | Official |
| 5999/TCP | CVSup [36] file update tool | Unknown |
| 6000/TCP | X11—used between an X client and server over the network | Official |
| 6001/UDP | X11—used between an X client and server over the network | Official |
| 6005/TCP | Default for BMC Software CONTROL-M/Server—Socket used for communication between CONTROL-M processes—though often changed during installation | Official |
| 6005/TCP | Default for Camfrog Chat & Cam Client http://www.camfrog.com | Unofficial |
| 6050/TCP | Brightstor Arcserve Backup | Unofficial |
| 6050/TCP | Nortel Software | Unofficial |
| 6051/TCP | Brightstor Arcserve Backup | Unofficial |
| 6072/TCP | iOperator Protocol Signal Port | Unofficial |
| 6086/TCP | PDTP—FTP like file server in a P2P network | Official |
| 6100/TCP | Vizrt System | Unofficial |
| 6101/TCP | Backup Exec Agent Browser | Unofficial |
| 6110/TCP,UDP | softcm, HP Softbench CM | Official |
| 6111/TCP,UDP | spc, HP Softbench Sub-Process Control | Official |
| 6112/TCP,UDP | "dtspcd"—a network daemon that accepts requests from clients to execute commands and launch applications remotely | Official |
| 6112/TCP | Blizzard's Battle.net gaming service, ArenaNet gaming service | Unofficial |
| 6112/TCP | Club Penguin Disney online game for kids | Unofficial |
| 6113/TCP | Club Penguin Disney online game for kids | Unofficial |
| 6129/TCP | DameWare Remote Control | Unofficial |
| 6257/UDP | WinMX (see also 6699) | Unofficial |
| 6346/TCP,UDP | gnutella-svc, Gnutella (FrostWire, Limewire, Shareaza, etc.) | Official |
| 6347/TCP,UDP | gnutella-rtr, Gnutella alternate | Official |
| 6389/TCP | EMC Clarrion | Unofficial |
| 6444/TCP,UDP | Sun Grid Engine—Qmaster Service | Official |
| 6445/TCP,UDP | Sun Grid Engine—Execution Service | Official |
| 6502/TCP,UDP | Danware Data NetOp Remote Control | Unofficial |
| 6522/TCP | Gobby (and other libobby-based software) | Unofficial |
| 6543/UDP | Paradigm Research & Development Jetnet[37] default | Unofficial |
| 6566/TCP | SANE (Scanner Access Now Easy)—SANE network scanner daemon | Unofficial |
| 6571 | Windows Live FolderShare client | Unofficial |
| 6600/TCP | Music Playing Daemon (MPD) | Unofficial |
| 6619/TCP,UDP | odette-ftps, Odette File Transfer Protocol (OFTP) over TLS/SSL | Official |
| 6646/UDP | McAfee Network Agent | Unofficial |
| 6660–6664/TCP | Internet Relay Chat | Unofficial |
| 6665–6669/TCP | Internet Relay Chat | Official |
| 6679/TCP | IRC SSL (Secure Internet Relay Chat)—often used | Unofficial |
| 6697/TCP | IRC SSL (Secure Internet Relay Chat)—often used | Unofficial |
| 6699/TCP | WinMX (see also 6257) | Unofficial |
| 6771/UDP | Polycom server broadcast | Unofficial |
| 6789/TCP | Datalogger Support Software Campbell Scientific Loggernet Software | Unofficial |
| 6881–6887/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6888/TCP,UDP | MUSE | Official |
| 6888/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6889–6890/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6891–6900/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6891–6900/TCP,UDP | Windows Live Messenger (File transfer) | Unofficial |
| 6901/TCP,UDP | Windows Live Messenger (Voice) | Unofficial |
| 6901/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6902–6968/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 6969/TCP,UDP | acmsoda | Official |
| 6969/TCP | BitTorrent tracker | Unofficial |
| 6970–6999/TCP,UDP | BitTorrent part of full range of ports used most often | Unofficial |
| 7000/TCP | Default for Vuze's built in HTTPS Bittorrent Tracker | Unofficial |
| 7001/TCP | Default for BEA WebLogic Server's HTTP server, though often changed during installation | Unofficial |
| 7002/TCP | Default for BEA WebLogic Server's HTTPS server, though often changed during installation | Unofficial |
| 7005/TCP | Default for BMC Software CONTROL-M/Server and CONTROL-M/Agent for Agent-to-Server, though often changed during installation | Official |
| 7006/TCP | Default for BMC Software CONTROL-M/Server and CONTROL-M/Agent for Server-to-Agent, though often changed during installation | Official |
| 7010/TCP | Default for Cisco AON AMC (AON Management Console) [2] | Unofficial |
| 7025/TCP | Zimbra LMTP [mailbox]—local mail delivery | Unofficial |
| 7047/TCP | Zimbra conversion server | Unofficial |
| 7133/TCP | Enemy Territory: Quake Wars | Unofficial |
| 7171/TCP | Tibia | Unofficial |
| 7306/TCP | Zimbra mysql [mailbox] | Unofficial |
| 7307/TCP | Zimbra mysql [logger] | Unofficial |
| 7312/UDP | Sibelius License Server | Unofficial |
| 7400/TCP,UDP | RTPS (Real Time Publish Subscribe) DDS Discovery | Official |
| 7401/TCP,UDP | RTPS (Real Time Publish Subscribe) DDS User-Traffic | Official |
| 7402/TCP,UDP | RTPS (Real Time Publish Subscribe) DDS Meta-Traffic | Official |
| 7670/TCP | BrettspielWelt BSW Boardgame Portal | Unofficial |
| 7777/TCP | iChat server file transfer proxy | Unofficial |
| 7777/TCP | Default used by Windows backdoor program tini.exe | Unofficial |
| 7831/TCP | Default used by Smartlaunch Internet Cafe Administration[38] software | Unofficial |
| 7915/TCP | Default for YSFlight server [3] | Unofficial |
| 8000/TCP,UDP | iRDMI (Intel Remote Desktop Management Interface)[39]—sometimes erroneously used instead of port 8080 | Official |
| 8000-8001/TCP | Commonly used for internet radio streams such as those using SHOUTcast | Unofficial |
| 8002/TCP | Cisco Systems Unified Call Manager Intercluster | Unofficial |
| 8008/TCP | HTTP Alternate | Official |
| 8008/TCP | IBM HTTP Server administration default | Unofficial |
| 8010/TCP | XMPP/Jabber File transfers | Unofficial |
| 8074/TCP | Gadu-Gadu | Unofficial |
| 8080/TCP | HTTP alternate (http_alt)—commonly used for Web proxy and caching server, or for running a Web server as a non-root user | Official |
| 8080/TCP | Apache Tomcat | Unofficial |
| 8080/UDP | FilePhile Master/Relay | Unofficial |
| 8081/TCP | HTTP alternate, e.g. McAfee ePolicy Orchestrator (ePO) | Unofficial |
| 8086/TCP | HELM Web Host Automation Windows Control Panel | Unofficial |
| 8086/TCP | Kaspersky AV Control Center | Unofficial |
| 8087/TCP | Hosting Accelerator Control Panel | Unofficial |
| 8087/UDP | Kaspersky AV Control Center | Unofficial |
| 8087/TCP | Parallels Plesk Control Panel | Unofficial |
| 8090/TCP | HTTP Alternate (http_alt_alt)—used as an alternative to port 8080 | Unofficial |
| 8116/UDP | Check Point Cluster Control Protocol | Unofficial |
| 8118/TCP | Privoxy—advertisement-filtering Web proxy | Official |
| 8123/TCP | Polipo Web proxy | Official |
| 8192/TCP | Sophos Remote Management System | Unofficial |
| 8193/TCP | Sophos Remote Management System | Unofficial |
| 8194/TCP | Sophos Remote Management System | Unofficial |
| 8200/TCP | GoToMyPC | Unofficial |
| 8220/TCP | Bloomberg | Unofficial |
| 8222 | VMware Server Management User Interface (insecure Web interface)[40]. See also port 8333 | Unofficial |
| 8243/TCP,UDP | HTTPS listener for Apache Synapse [41] | Official |
| 8280/TCP,UDP | HTTP listener for Apache Synapse [41] | Official |
| 8291/TCP | Winbox—Default on a MikroTik RouterOS for a Windows application used to administer MikroTik RouterOS | Unofficial |
| 8294/TCP | Bloomberg | Unofficial |
| 8333 | VMware Server Management User Interface (secure Web interface)[40]. See also port 8222 | Unofficial |
| 8400/TCP,UDP | cvp, Commvault Unified Data Management | Official |
| 8443/TCP | SW Soft Plesk Control Panel | Unofficial |
| 8484/TCP,UDP | MapleStory | Unofficial |
| 8500/TCP,IPX | ColdFusion Macromedia/Adobe ColdFusion default and Duke Nukem 3D—default | Unofficial |
| 8501/TCP | [4] DukesterX —default | Unofficial |
| 8701/UDP | SoftPerfect Bandwidth Manager | Unofficial |
| 8702/UDP | SoftPerfect Bandwidth Manager | Unofficial |
| 8767/UDP | TeamSpeak—default | Unofficial |
| 8880/UDP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Official |
| 8880/TCP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Official |
| 8880/TCP | WebSphere Application Server SOAP connector default | Unofficial |
| 8881/TCP | Atlasz Informatics Research Ltd Secure Application Server | Unofficial |
| 8882/TCP | Atlasz Informatics Research Ltd Secure Application Server | Unofficial |
| 8888/TCP,UDP | NewsEDGE server | Official |
| 8888/TCP | Sun Answerbook dwhttpd server (deprecated by docs.sun.com) | Unofficial |
| 8888/TCP | GNUmp3d HTTP music streaming and Web interface | Unofficial |
| 8888/TCP | LoLo Catcher HTTP Web interface (www.optiform.com) | Unofficial |
| 8888/TCP | D2GS Admin Console Telnet administration console for D2GS servers (Diablo 2) | Unofficial |
| 9000/TCP | Buffalo LinkSystem Web access | Unofficial |
| 9000/TCP | DBGp | Unofficial |
| 9000/TCP | SqueezeCenter web server & streaming | Unofficial |
| 9000/UDP | UDPCast | Unofficial |
| 9001 | cisco-xremote router configuration | Unofficial |
| 9001 | Tor network default | Unofficial |
| 9001/TCP | DBGp Proxy | Unofficial |
| 9009/TCP,UDP | Pichat Server—Peer to peer chat software | Official |
| 9030/TCP | Tor often used | Unofficial |
| 9043/TCP | WebSphere Application Server Administration Console secure | Unofficial |
| 9050/TCP | Tor | Unofficial |
| 9051/TCP | Tor | Unofficial |
| 9060/TCP | WebSphere Application Server Administration Console | Unofficial |
| 9080/UDP | glrpc, Groove Collaboration software GLRPC | Official |
| 9080/TCP | glrpc, Groove Collaboration software GLRPC | Official |
| 9080/TCP | WebSphere Application Server HTTP Transport (port 1) default | Unofficial |
| 9090/TCP | Openfire Administration Console | Unofficial |
| 9090/TCP | SqueezeCenter control (CLI) | Unofficial |
| 9091/TCP | Openfire Administration Console (SSL Secured) | Unofficial |
| 9100/TCP | PDL Data Stream | Official |
| 9101 | Bacula Director | Official |
| 9102 | Bacula File Daemon | Official |
| 9103 | Bacula Storage Daemon | Official |
| 9110/UDP | SSMP Message protocol | Unofficial |
| 9119/TCP,UDP | MXit Instant Messenger | Official |
| 9300/TCP | IBM Cognos 8 SOAP Business Intelligence and Performance Management | Unofficial |
| 9418/TCP,UDP | git, Git pack transfer service | Official |
| 9443/TCP | WSO2 Web Services Application Server HTTPS transport (officially WSO2 Tungsten HTTPS | Official |
| 9443/TCP | WebSphere Application Server HTTP Transport (port 2) default | Unofficial |
| 9535/TCP | mngsuite, LANDesk Management Suite Remote Control | Official |
| 9535/TCP | BBOS001, IBM Websphere Application Server (WAS) High Avail Mgr Com | Unofficial |
| 9535/UDP | mngsuite, LANDesk Management Suite Remote Control | Official |
| 9800/TCP,UDP | WebDAV Source | Official |
| 9800 | WebCT e-learning portal | Unofficial |
| 9875/TCP | Club Penguin Disney online game for kids | Unofficial |
| 9898/TCP,UDP | MonkeyCom | Official |
| 9898/TCP | Tripwire - File Integrity Monitoring Software | Unofficial |
| 9999 | Hydranode—edonkey2000 TELNET control | Unofficial |
| 9999/TCP | Lantronix UDS-10/UDS100[42] RS-485 to Ethernet Converter TELNET control | Unofficial |
| 9999 | Urchin Web Analytics | Unofficial |
| 10000 | Webmin—Web-based Linux admin tool | Unofficial |
| 10000 | BackupExec | Unofficial |
| 10000 | Ericsson Account Manager (avim) | Unofficial |
| 10001/TCP | Lantronix UDS-10/UDS100[43] RS-485 to Ethernet Converter default | Unofficial |
| 10008/TCP,UDP | Octopus Multiplexer, primary port for the CROMP protocol, which provides a platform-independent means for communication of objects across a network | Official |
| 10017 | AIX,NeXT, HPUX—rexd daemon control | Unofficial |
| 10024/TCP | Zimbra smtp [mta]—to amavis from postfix | Unofficial |
| 10025/TCP | Ximbra smtp [mta]—back to postfix from amavis | Unofficial |
| 10050/TCP,UDP | Zabbix-Agent | Official |
| 10051/TCP,UDP | Zabbix-Trapper | Official |
| 10113/TCP,UDP | NetIQ Endpoint | Official |
| 10114/TCP,UDP | NetIQ Qcheck | Official |
| 10115/TCP,UDP | NetIQEndpoint | Official |
| 10116/TCP,UDP | NetIQ VoIP Assessor | Official |
| 10200/TCP | FRISK Software International's fpscand virus scanning daemon for Unix platforms [5] | Unofficial |
| 10200–10204/TCP | FRISK Software International's f-protd virus scanning daemon for Unix platforms [6] | Unofficial |
| 10308 | Lock-on: Modern Air Combat | Unofficial |
| 10480 | SWAT 4 Dedicated Server | Unofficial |
| 11211 | memcached | Unofficial |
| 11235 | Savage:Battle for Newerth Server Hosting | Unofficial |
| 11294 | Blood Quest Online Server | Unofficial |
| 11371 | OpenPGP HTTP key server | Official |
| 11576 | IPStor Server management communication | Unofficial |
| 12012/TCP,UDP | Audition Online Dance Battle, Korea Server - Status/Version Check | Unofficial |
| 12013/TCP,UDP | Audition Online Dance Battle, Korea Server | Unofficial |
| 12035/UDP | Linden Lab viewer to sim | Unofficial |
| 12345 | NetBus—remote administration tool (often Trojan horse). Also used by NetBuster. Little Fighter 2 (TCP). | Unofficial |
| 12975/TCP | LogMeIn Hamachi (VPN tunnel software; also port 32976)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Unofficial |
| 12998-12999/UDP | Takenaka RDI Mirror World on SL | Unofficial |
| 13000–13050/UDP | Linden Lab viewer to sim | Unofficial |
| 13076/TCP | Default for BMC Software CONTROL-M/Enterprise Manager Corba communication, though often changed during installation | Official |
| 13720/TCP,UDP | Symantec NetBackup—bprd (formerly VERITAS) | Official |
| 13721/TCP,UDP | Symantec NetBackup—bpdbm (formerly VERITAS) | Official |
| 13724/TCP,UDP | Symantec Network Utility—vnetd (formerly VERITAS) | Official |
| 13782/TCP,UDP | Symantec NetBackup—bpcd (formerly VERITAS) | Official |
| 13783/TCP,UDP | Symantec VOPIED protocol (formerly VERITAS) | Official |
| 13785/TCP,UDP | Symantec NetBackup Database—nbdb (formerly VERITAS) | Official |
| 13786/TCP,UDP | Symantec nomdb (formerly VERITAS) | Official |
| 14552/TCP | Lasso (programming language) application service | Unofficial |
| 14567/UDP | Battlefield 1942 and mods | Unofficial |
| 15000/TCP | psyBNC | Unofficial |
| 15000/TCP | Wesnoth | Unofficial |
| 15000/TCP | Kaspersky Network Agent | Unofficial |
| 15000/TCP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Official |
| 15000/UDP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Official |
| 15567/UDP | Battlefield Vietnam and mods | Unofficial |
| 15345/TCP,UDP | XPilot Contact | Official |
| 16000/TCP | shroudBNC | Unofficial |
| 16080/TCP | Mac OS X Server Web (HTTP) service with performance cache[44] | Unofficial |
| 16384/UDP | Iron Mountain Digital online backup | Unofficial |
| 16567/UDP | Battlefield 2 and mods | Unofficial |
| 18180/TCP | DART Reporting server | Unofficial |
| 18200/TCP,UDP | Audition Online Dance Battle, AsiaSoft Thailand Server - Status/Version Check | Unofficial |
| 18201/TCP,UDP | Audition Online Dance Battle, AsiaSoft Thailand Server | Unofficial |
| 18206/TCP,UDP | Audition Online Dance Battle, AsiaSoft Thailand Server - FAM Database | Unofficial |
| 18300/TCP,UDP | Audition Online Dance Battle, AsiaSoft SEA Server - Status/Version Check | Unofficial |
| 18301/TCP,UDP | Audition Online Dance Battle, AsiaSoft SEA Server | Unofficial |
| 18306/TCP,UDP | Audition Online Dance Battle, AsiaSoft SEA Server - FAM Database | Unofficial |
| 18400/TCP,UDP | Audition Online Dance Battle, KAIZEN Brazil Server - Status/Version Check | Unofficial |
| 18401/TCP,UDP | Audition Online Dance Battle, KAIZEN Brazil Server | Unofficial |
| 18505/TCP,UDP | Audition Online Dance Battle, Nexon Server - Status/Version Check | Unofficial |
| 18506/TCP,UDP | Audition Online Dance Battle, Nexon Server | Unofficial |
| 18605/TCP,UDP | X-BEAT - Status/Version Check | |
| 18606/TCP,UDP | X-BEAT | Unofficial |
| 19000/TCP,UDP | Audition Online Dance Battle, G10/alaplaya Server - Status/Version Check | Unofficial |
| 19001/TCP,UDP | Audition Online Dance Battle, G10/alaplaya Server | Unofficial |
| 19226/TCP | Panda Software AdminSecure Communication Agent | Unofficial |
| 19638/TCP | Ensim Control Panel | Unofficial |
| 19771/TCP,UDP | Softros LAN Messenger | Unofficial |
| 19813/TCP | 4D database Client Server Communication | Unofficial |
| 19880/TCP | Softros LAN Messenger | Unofficial |
| 20000 | DNP (Distributed Network Protocol), a protocol used in SCADA systems between communicating RTU's and IED's | Official |
| 20000 | Usermin, Web-based user tool | Unofficial |
| 20014/TCP | DART Reporting server | Unofficial |
| 20720/TCP | Symantec i3 Web GUI server | Unofficial |
| 22347/TCP,UDP | WibuKey, WIBU-SYSTEMS AG Software protection system | Official |
| 22350/TCP,UDP | CodeMeter, WIBU-SYSTEMS AG Software protection system | Official |
| 23073 | Soldat Dedicated Server | Unofficial |
| 23513 | [7] Duke Nukem Ports | Unofficial |
| 24444 | NetBeans integrated development environment | Unofficial |
| 24465/TCP,UDP | Tonido Directory Server for Tonido which is a Personal Web app and peer-to-peer platform | Official |
| 24554/TCP,UDP | BINKP, Fidonet mail transfers over TCP/IP | Official |
| 24800 | Synergy: keyboard/mouse sharing software | Unofficial |
| 24842 | StepMania: Online: Dance Dance Revolution Simulator | Unofficial |
| 25999/TCP | Xfire | Unofficial |
| 26000/TCP,UDP | id Software's Quake server | Official |
| 26000/TCP | CCP's EVE Online Online gaming MMORPG | Unofficial |
| 26900/TCP | CCP's EVE Online Online gaming MMORPG | Unofficial |
| 26901/TCP | CCP's EVE Online Online gaming MMORPG | Unofficial |
| 27000/UDP | (through 27006) id Software's QuakeWorld master server | Unofficial |
| 27010 | Half-Life and its mods, such as Counter-Strike | Unofficial |
| 27015 | Half-Life and its mods, such as Counter-Strike | Unofficial |
| 27374 | Sub7 default. Most script kiddies do not change from this. | Unofficial |
| 27500/UDP | (through 27900) id Software's QuakeWorld | Unofficial |
| 27888/UDP | Kaillera server | Unofficial |
| 27900 | (through 27901) Nintendo Wi-Fi Connection | Unofficial |
| 27901/UDP | (through 27910) id Software's Quake II master server | Unofficial |
| 27960/UDP | (through 27969) Activision's Enemy Territory and id Software's Quake III Arena and Quake III and some ioquake3 derived games | Unofficial |
| 28001 | Starsiege: Tribes Common/default Tribes v.1 Server | Unofficial |
| 28395/TCP | www.SmartSystemsLLC.com Used by Smart Sale® 5.0 | Unofficial |
| 28910 | Nintendo Wi-Fi Connection | Unofficial |
| 28960 | Call of Duty 2 Common Call of Duty 2 (PC Version) | Unofficial |
| 28961 | Call of Duty 4: Modern Warfare Common Call of Duty 4 (PC Version) | Unofficial |
| 29900 | (through 29901) Nintendo Wi-Fi Connection | Unofficial |
| 29920 | Nintendo Wi-Fi Connection | Unofficial |
| 30000 | Pokemon Netbattle | Unofficial |
| 30301 | BitTorrent | Unofficial |
| 30564/TCP | Multiplicity: keyboard/mouse/clipboard sharing software | Unofficial |
| 31337/TCP | Back Orifice—remote administration tool (often Trojan horse) | Unofficial |
| 31415 | ThoughtSignal—Server Communication Service (often Informational) | Unofficial |
| 31456/TCP | TetriNET IRC gateway on some servers | Unofficial |
| 31457/TCP | TetriNET | Official |
| 31458/TCP | TetriNET Used for game spectators | Unofficial |
| 32245/TCP | MMTSG-mutualed over MMT (encrypted transmission) | Unofficial |
| 32976/TCP | LogMeIn Hamachi (VPN tunnel software; also port 12975)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Unofficial |
| 33434/TCP,UDP | traceroute | Official |
| 34443 | Linksys PSUS4 print server | Unofficial |
| 37777/TCP | Digital Video Recorder hardware | Unofficial |
| 36963 | Counter Strike 2D multiplayer (2D clone of popular CounterStrike computer game) | Unofficial |
| 40000/TCP,UDP | SafetyNET p Real-time Industrial Ethernet protocol | Official |
| 43594–43595/TCP | RuneScape | Unofficial |
| 47808/TCP,UDP | BACnet Building Automation and Control Networks | Official |
| 49151/TCP,UDP | Reserved[1] | Official |