TABLE LEGEND
WELL KNOWN PORTS
Use | Description | Color |
Official | Port is registered with IANA for the application | White |
Unofficial | Port is not registered with IANA for the application | Red |
Multiple use | Multiple applications are known to use this port. | Purple |
WELL KNOWN PORTS
Port | TCP | UDP | Description | Status |
0 | UDP | Reserved | Official | |
1 | TCP | UDP | TCP Port Service Multiplexer (TCPMUX) | Official |
2 | TCP | UDP | CompressNET Management Utility | Official |
3 | TCP | UDP | CompressNET Compression Process | Official |
4 | TCP | UDP | Unassigned | Official |
5 | TCP | UDP | Remote Job Entry | Official |
7 | TCP | UDP | Echo Protocol | Official |
8 | TCP | UDP | Unassigned | Official |
9 | TCP | UDP | Discard Protocol | Official |
9 | UDP | Wake-on-LAN | Unofficial | |
10 | TCP | UDP | Unassigned | Official |
11 | TCP | UDP | Active Users (systat service) | Official |
12 | TCP | UDP | Unassigned | Official |
13 | TCP | UDP | Daytime Protocol (RFC 867) | Official |
14 | TCP | UDP | Unassigned | Official |
15 | TCP | UDP | Previously netstat service | Unofficial |
16 | TCP | UDP | Unassigned | Official |
17 | TCP | UDP | Quote of the Day | Official |
18 | TCP | UDP | Message Send Protocol | Official |
19 | TCP | UDP | Character Generator Protocol (CHARGEN) | Official |
20 | TCP | UDP | FTP data transfer | 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 | UDP | Telnet protocol—unencrypted text communications | Official |
24 | TCP | UDP | Priv-mail : any private mail system. | Official |
25 | TCP | Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers | Official | |
26 | TCP | UDP | Unassigned | Official |
27 | TCP | UDP | NSW User System FE | Official |
29 | TCP | UDP | MSG ICP | Official |
33 | TCP | UDP | Display Support Protocol | Official |
35 | TCP | UDP | Any private printer server protocol | Official |
37 | TCP | UDP | TIME protocol | Official |
39 | TCP | UDP | Resource Location Protocol (RLP)—used for determining the location of higher level services from hosts on a network | Official |
40 | TCP | UDP | Unassigned | Official |
42 | TCP | UDP | ARPA Host Name Server Protocol | Official |
42 | TCP | UDP | Windows Internet Name Service | Unofficial |
43 | TCP | WHOIS protocol | Official | |
47 | TCP | UDP | NI FTP | Official |
49 | TCP | UDP | TACACS Login Host protocol | Official |
50 | TCP | UDP | Remote Mail Checking Protocol | Official |
51 | TCP | UDP | IMP Logical Address Maintenance | Official |
52 | TCP | UDP | XNS (Xerox Network Systems) Time Protocol | Official |
53 | TCP | UDP | Domain Name System (DNS) | Official |
54 | TCP | UDP | XNS (Xerox Network Systems) Clearinghouse | Official |
55 | TCP | UDP | ISI Graphics Language (ISI-GL) | Official |
56 | TCP | UDP | XNS (Xerox Network Systems) Authentication | Official |
56 | TCP | UDP | Route Access Protocol (RAP) | Unofficial |
57 | TCP | Mail Transfer Protocol (RFC 780) | Official | |
58 | TCP | UDP | XNS (Xerox Network Systems) Mail | Official |
64 | TCP | UDP | CI (Travelport) (formerly Covia) Comms Integrator | 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 | |
71 | TCP | NETRJS protocol | Official | |
72 | TCP | NETRJS protocol | Official | |
73 | TCP | NETRJS protocol | Official | |
74 | TCP | NETRJS 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 | |
88 | TCP | UDP | Kerberos—authentication system | Official |
90 | TCP | UDP | dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map | Official |
90 | TCP | UDP | PointCast (dotcom) | Unofficial |
99 | TCP | WIP Message protocol | Unofficial | |
100 | UDP | CyberGate RAT protocol | Unofficial | |
101 | TCP | NIC host name | Official | |
102 | TCP | ISO-TSAP (Transport Service Access Point) Class 0 protocol; also used by Digital Equipment Corporation DECnet (Phase V+) over TCP/IP | Official | |
104 | TCP | UDP | ACR/NEMA Digital Imaging and Communications in Medicine (DICOM) | Official |
105 | TCP | UDP | CCSO Nameserver Protocol (Qi/Ph) | Official |
107 | TCP | Remote TELNET Service protocol | Official | |
108 | TCP | UDP | SNA Gateway Access Server | Official |
109 | TCP | Post Office Protocol v2 (POP2) | Official | |
110 | TCP | Post Office Protocol v3 (POP3) | Official | |
111 | TCP | UDP | ONC RPC (Sun RPC) | Official |
113 | TCP | Ident—Authentication Service/Identification Protocol, used by IRC servers to identify users | Official | |
113 | UDP | Authentication Service (auth) | Official | |
115 | TCP | Simple File Transfer Protocol (SFTP) | Official | |
117 | STD | UUCP Path Service | Official | |
118 | TCP | UDP | SQL (Structured Query Language) Services | Official |
119 | TCP | Network News Transfer Protocol (NNTP)—retrieval of newsgroup messages | Official | |
123 | UDP | Network Time Protocol (NTP)—used for time synchronization | Official | |
126 | TCP | UDP | Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development | Official |
135 | TCP | UDP | DCE endpoint resolution | Official |
135 | TCP | UDP | Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM | 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 | Internet Message Access Protocol (IMAP)—management of email messages | Official | |
152 | TCP | UDP | Background File Transfer Program (BFTP) | 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 | UDP | Simple Network Management Protocol (SNMP) | Official | |
162 | TCP | UDP | Simple Network Management Protocol Trap (SNMPTRAP) | Official |
170 | TCP | Print-srv, Network PostScript | Official | |
175 | TCP | VMNET (IBM z/VM, z/OS & z/VSE - Network Job Entry(NJE)) | Official | |
177 | TCP | UDP | X Display Manager Control Protocol (XDMCP) | Official |
179 | TCP | BGP (Border Gateway Protocol) | Official | |
194 | TCP | UDP | Internet Relay Chat (IRC) | Official |
199 | TCP | UDP | SMUX, SNMP Unix Multiplexer | Official |
201 | TCP | UDP | AppleTalk Routing Maintenance | Official |
209 | TCP | UDP | The Quick Mail Transfer Protocol | Official |
210 | TCP | UDP | ANSI Z39.50 | Official |
213 | TCP | UDP | Internetwork Packet Exchange (IPX) | Official |
218 | TCP | UDP | Message posting protocol (MPP) | Official |
220 | TCP | UDP | Internet Message Access Protocol (IMAP), version 3 | Official |
259 | TCP | UDP | ESRO, Efficient Short Remote Operations | Official |
264 | TCP | UDP | BGMP, Border Gateway Multicast Protocol | Official |
280 | TCP | UDP | http-mgmt | Official |
300 | TCP | ThinLinc Web Access | Unofficial | |
308 | TCP | Novastor Online Backup | Official | |
311 | TCP | Mac OS X Server Admin (officially AppleShare IP Web administration) | Official | |
318 | TCP | UDP | PKIX TSP, Time Stamp Protocol | Official |
319 | UDP | Precision time protocol event messages | Official | |
320 | UDP | Precision time protocol general messages | Official | |
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 |
370 | TCP | codaauth2—Coda authentication server | Official | |
370 | UDP | codaauth2—Coda authentication server | Official | |
370 | UDP | securecast1—Outgoing packets to NAI's servers | Unofficial | |
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[19] | Official |
389 | TCP | UDP | Lightweight Directory Access Protocol (LDAP) | Official |
399 | TCP | UDP | Digital Equipment Corporation DECnet (Phase V+) over TCP/IP | Official |
401 | TCP | UDP | UPS Uninterruptible Power Supply | Official |
427 | TCP | UDP | Service Location Protocol (SLP) | Official |
443 | TCP | HTTPS (Hypertext Transfer Protocol over SSL/TLS) | Official | |
444 | TCP | UDP | SNPP, Simple Network Paging Protocol (RFC 1568) | Official |
445 | TCP | Microsoft-DS Active Directory, Windows shares | Official | |
445 | TCP | Microsoft-DS SMB file sharing | Official | |
464 | TCP | UDP | Kerberos Change/Set password | Official |
465 | TCP | URL Rendesvous Directory for SSM (Cisco protocol) | Official | |
475 | TCP | UDP | tcpnethaspsrv (Aladdin Knowledge Systems 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 |
512 | TCP | Rexec, Remote Process Execution | Official | |
512 | UDP | comsat, together with biff | Official | |
513 | TCP | rlogin | Official | |
513 | UDP | Who | Official | |
514 | TCP | Shell—used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh) | 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 Information Protocol (RIP) | Official | |
524 | TCP | UDP | NetWare Core Protocol (NCP) 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 | 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 | |
545 | TCP | OSIsoft PI (VMS), OSISoft PI Server Client Access | Unofficial | |
546 | TCP | UDP | DHCPv6 client | Official |
547 | TCP | UDP | DHCPv6 server | Official |
548 | TCP | Apple Filing Protocol (AFP) over TCP | Official | |
550 | TCP | 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 (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, a protocol for BEEP peers to form an application layer tunnel | Official | |
623 | UDP | ASF Remote Management and Control Protocol (ASF-RMCP) | Official | |
631 | TCP | UDP | Internet Printing Protocol (IPP) | Official |
631 | TCP | UDP | Common Unix Printing System (CUPS) | Unofficial |
635 | TCP | UDP | RLZ DBase | Official |
636 | TCP | UDP | Lightweight Directory Access Protocol over TLS/SSL (LDAPS) | Official |
639 | TCP | UDP | MSDP, Multicast Source Discovery Protocol | Official |
641 | TCP | UDP | SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic | Official |
646 | TCP | UDP | LDP, Label Distribution Protocol, a routing protocol used in MPLS networks | Official |
647 | TCP | DHCP Failover protocol | Official | |
648 | TCP | RRP (Registry Registrar Protocol) | Official | |
651 | TCP | UDP | IEEE-MMS | Official |
653 | TCP | UDP | SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic | Official |
654 | TCP | Media Management System (MMS) Media Management Protocol (MMP) | Official | |
657 | TCP | UDP | IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM) and Hardware Management Consoleto connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration | Official |
660 | TCP | Mac OS X Server administration | Official | |
666 | UDP | Doom, first online first-person shooter | Official | |
666 | TCP | airserv-ng, aircrack-ng's server for remote-controlling wireless devices | Unofficial | |
674 | TCP | ACAP (Application Configuration Access Protocol) | Official | |
688 | TCP | UDP | REALM-RUSD (ApplianceWare Server Appliance Management Protocol) | Official |
691 | TCP | MS Exchange Routing | Official | |
694 | TCP | UDP | Linux-HA High availability Heartbeat | Official |
695 | TCP | IEEE-MMS-SSL (IEEE Media Management System over SSL) | Official | |
698 | UDP | OLSR (Optimized Link State Routing) | Official | |
700 | TCP | EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 5734) | Official | |
701 | TCP | LMP (Link Management Protocol (Internet)), a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links | Official | |
702 | TCP | IRIS (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol) (RFC 3983) | Official | |
706 | TCP | Secure Internet Live Conferencing (SILC) | Official | |
711 | TCP | Cisco Tag Distribution Protocol—being replaced by the MPLS Label Distribution Protocol | Official | |
712 | TCP | Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684) | Official | |
749 | TCP | UDP | Kerberos (protocol) administration | Official |
750 | UDP | kerberos-iv, Kerberos version IV | Official | |
751 | TCP | UDP | kerberos_master, Kerberos authentication | Unofficial |
752 | UDP | passwd_server, Kerberos Password (kpasswd) server | Unofficial | |
753 | TCP | Reverse Routing Header (rrh) | Official | |
753 | UDP | Reverse Routing Header (rrh) | Official | |
753 | UDP | userreg_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 | krbupdate [kreg], Kerberos registration | Unofficial |
782 | TCP | Conserver serial-console management server | Unofficial | |
783 | TCP | SpamAssassin spamd daemon | Unofficial | |
800 | UDP | mdbe daemon | Official | |
808 | TCP | Microsoft Net.TCP Port Sharing Service | Official | |
829 | TCP | Certificate Management Protocol | Unofficial | |
843 | TCP | Adobe Flash | Unofficial | |
847 | TCP | DHCP Failover protocol | Official | |
848 | TCP | UDP | Group Domain Of Interpretation (GDOI) protocol | Official |
860 | TCP | iSCSI (RFC 3720) | Official | |
861 | TCP | UDP | OWAMP control (RFC 4656) | Official |
862 | TCP | UDP | TWAMP control (RFC 5357) | Official |
873 | TCP | rsync file synchronization protocol | Official | |
888 | TCP | cddbp, CD DataBase (CDDB) protocol (CDDBP) | Unofficial | |
897 | TCP | UDP | Brocade SMI-S RPC | Unofficial |
898 | TCP | UDP | Brocade SMI-S RPC SSL | Unofficial |
901 | TCP | Samba Web Administration Tool (SWAT) | Unofficial | |
901 | TCP | VMware Virtual Infrastructure Client (UDP from server being managed to management console) | Unofficial | |
901 | UDP | VMware Virtual Infrastructure Client (UDP from server being managed to management console) | Unofficial | |
902 | TCP | ideafarm-door | Official | |
902 | TCP | VMware Server Console (TCP from management console to server being Managed) | Unofficial | |
902 | UDP | ideafarm-door | Official | |
902 | UDP | VMware Server Console (UDP from server being managed to management console) | Unofficial | |
903 | TCP | VMware Remote Console | 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 | |
944 | UDP | Network File System (protocol) Service | Unofficial | |
953 | TCP | UDP | Domain Name System (DNS) RNDC Service | Unofficial |
973 | UDP | Network File System (protocol) over IPv6 Service | Unofficial | |
981 | TCP | SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software | Unofficial | |
987 | TCP | Microsoft Corporation Microsoft Windows SBS SharePoint | 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 | |
1002 | TCP | Opsware agent (aka cogbot) | Unofficial | |
1010 | TCP | ThinLinc Web Administration | Unofficial | |
1023 | TCP | UDP | Reserved | Official |