Perhaps you’re angsty that you’ve forgotten what a certain port number meant. Rest assured, you don’t have to remember all 65,535 port numbers. With so much information to remember, it’s understandable if you forget a common port. That’s why we put together this cheat sheet of common network ports for you.
A crucial domain of expertise in IT-related certifications such as Cisco Certified Network Associate (CCNA) and those of CompTIA is port numbers and associated services, which this common ports and protocols cheat sheet covers. If you want to remember a port number or protocol, this cheat sheet will help everyone, from students to professionals.
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Table Of ContentsThe following tables cover services (and malware) that use common TCP ports and some UDP or SCTP ports.
| Port number | Service name | Transport protocol | Description |
|---|---|---|---|
| 7 | Echo | TCP, UDP | Echo service |
| 19 | CHARGEN | TCP, UDP | Character Generator Protocol, has severe vulnerabilities and thus is rarely used nowadays |
| 20 | FTP-data | TCP, SCTP | File Transfer Protocol data transfer |
| 21 | FTP | TCP, UDP, SCTP | File Transfer Protocol command control |
| 22 | SSH/SCP/SFTP | TCP, UDP, SCTP | Secure Shell, secure logins, file transfers ( scp, sftp ), and port forwarding |
| 23 | Telnet | TCP | Telnet protocol, for unencrypted text communications |
| 25 | SMTP | TCP | Simple Mail Transfer Protocol, used for email routing between mail servers |
| 42 | WINS Replication | TCP, UDP | Microsoft Windows Internet Name Service, vulnerable to attacks on a local network |
| 43 | WHOIS | TCP, UDP | Whois service, provides domain-level information |
| 49 | TACACS | UDP; can also use TCP but not necessarily on port 49 | Terminal Access Controller Access-Control System, provides remote authentication and related services for network access |
| 53 | DNS | TCP, UDP | Domain Name System name resolver |
| 67 | DHCP/BOOTP | UDP | Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; server port |
| 68 | DHCP/BOOTP | UDP | Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; client port |
| 69 | TFTP | UDP | Trivial File Transfer Protocol |
| 70 | Gopher | TCP | Gopher is a communication protocol for distributing, searching, and retrieving documents in Internet Protocol (IP) networks |
| 79 | Finger | TCP | Name/Finger protocol and Finger user information protocol, for retrieving and manipulating user information |
| 80 | HTTP | TCP, UDP, SCTP | Hypertext Transfer Protocol (HTTP) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP |
| 88 | Kerberos | TCP, UDP | Network authentication system |
| 102 | Microsoft Exchange ISO-TSAP | TCP | Microsoft Exchange ISO Transport Service Access Point (TSAP) Class 0 protocol |
| 110 | POP3 | TCP | Post Office Protocol, version 3 (POP3) |
| 113 | Ident | TCP | Identification Protocol, for identifying the user of a particular TCP connection |
| 119 | NNTP (Usenet) | TCP | Network News Transfer Protocol |
| 123 | NTP | UDP | Network Time Protocol |
| 135 | Microsoft RPC EPMAP | TCP, UDP | Microsoft Remote Procedure Call (RPC) Endpoint Mapper (EPMAP) service, for remote system access and management |
| 137 | NetBIOS-ns | TCP, UDP | NetBIOS Name Service, used for name registration and resolution |
| 138 | NetBIOS-dgm | TCP, UDP | NetBIOS Datagram Service, used for providing access to shared resources |
| 139 | NetBIOS-ssn | TCP, UDP | NetBIOS Session Service |
| 143 | IMAP | TCP, UDP | Internet Message Access Protocol (IMAP), management of electronic mail messages on a server |
| 161 | SNMP-agents (unencrypted) | UDP | Simple network management protocol; agents communicate on this port |
| 162 | SNMP-trap (unencrypted) | UDP | Simple network management protocol; listens for asynchronous traps |
| 177 | XDMCP | UDP | X Display Manager Control Protocol |
| 179 | BGP | TCP | Border Gateway Protocol |
| 194 | IRC | UDP | Internet Relay Chat |
| 201 | AppleTalk | TCP, UDP | AppleTalk Routing Maintenance. Trojan horses and computer viruses have used UDP port 201. |
| 264 | BGMP | TCP, UDP | Border Gateway Multicast Protocol |
| 318 | TSP | TCP, UDP | Time Stamp Protocol |
| 381 | HP Openview | TCP, UDP | HP performance data collector |
| 383 | HP Openview | TCP, UDP | HP data alarm manager |
| 389 | LDAP | TCP, UDP | Lightweight directory access protocol |
| 411 | (Multiple uses) | TCP, UDP | Direct Connect Hub, Remote MT Protocol |
| 412 | (Multiple uses) | TCP, UDP | Direct Connect Client-to-Client, Trap Convention Port |
| 427 | SLP | TCP | Service Location Protocol |
| 443 | HTTPS (HTTP over SSL) | TCP, UDP, SCTP | Hypertext Transfer Protocol Secure (HTTPS) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP. |
| 445 | Microsoft DS SMB | TCP, UDP | Microsoft Directory Services: TCP for Active Directory, Windows shares; UDP for Server Message Block (SMB) file-sharing |
| 464 | Kerberos | TCP, UDP | For password settings on Kerberos |
| 465 | SMTP over TLS/SSL, SSM | TCP | Authenticated SMTP over TLS/SSL (SMTPS), URL Rendezvous Directory for Cisco’s Source Specific Multicast protocol (SSM) |
| 497 | Dantz Retrospect | TCP, UDP | A software suite for backing up operating systems |
| 500 | IPSec / ISAKMP / IKE | UDP | Internet Protocol Security / Internet Security Association and Key Management Protocol / Internet Key Exchange |
| 512 | rexec | TCP | Remote Process Execution |
| 513 | rlogin | TCP | The Unix program rlogin allows users to log in on another host using a network. |
| 514 | syslog | UDP | Syslog Protocol, for collecting and organizing all of the log files sent from the various devices on a network |
| 515 | LPD/LPR | TCP | Line Printer Daemon protocol, or Line Printer Remote protocol |
| 520 | RIP | UDP | Routing Information Protocol, used to find the optimal path between source and destination networks |
| 521 | RIPng (IPv6) | UDP | Routing Information Protocol next generation, the IPv6 compatible version of RIP |
| 540 | UUCP | TCP | Unix-to-Unix Copy Protocol |
| 548 | AFP | TCP | Apple Filing Protocol |
| 554 | RTSP | TCP, UDP | Real Time Streaming Protocol |
| 546 | DHCPv6 | TCP, UDP | Dynamic Host Configuration Protocol version 6. DHCPv6 Clients listen for DHCPv6 messages on UDP port 546. |
| 547 | DHCPv6 | TCP, UDP | DHCPv6 Servers and DHCPv6 Relay Agents listen for DHCPv6 messages on UDP port 547. |
| 560 | rmonitor | UDP | Remote Monitor |
| 563 | NNTP over TLS/SSL | TCP, UDP | Network News Transfer Protocol with encryption and verification |
| 587 | SMTP | TCP | For email message submission via SMTP |
| 591 | FileMaker | TCP | FileMaker Web Companion, the web publishing technology available in FileMaker versions 4-6 |
| 593 | Microsoft DCOM | TCP, UDP | Distributed Component Object Model (DCOM) |
| 596 | SMSD | TCP, UDP | SysMan Station daemon |
| 631 | IPP | TCP | Internet Printing Protocol |
| 636 | LDAP over TLS/SSL | TCP, UDP | Lightweight Directory Access Protocol over TLS/SSL |
| 639 | MSDP (PIM) | TCP | Multicast Source Discovery Protocol, which is part of the Protocol Independent Multicast (PIM) family |
| 646 | LDP (MPLS) | TCP, UDP | Label Distribution Protocol, applies to routers capable of Multiprotocol Label Switching (MPLS) |
| 691 | Microsoft Exchange | TCP | Microsoft Exchange Routing |
| 860 | iSCSI | TCP | Internet Small Computer Systems Interface |
| 873 | rsync | TCP | The rsync file synchronization protocol efficiently transfers and synchronizes files between devices and networked computers. |
| 902 | VMware Server | TCP, UDP | VMware ESXi, a hypervisor |
| 989 | FTPS | TCP | File Transfer Protocol (data) over TLS/SSL |
| 990 | FTPS | TCP | File Transfer Protocol (control) over TLS/SSL |
| 993 | IMAP over SSL (IMAPS) | TCP | Internet Message Access Protocol over TLS/SSL |
| 995 | POP3 over SSL (POP3S) | TCP, UDP | Post Office Protocol 3 over TLS/SSL |
| Port number | Service name | Transport protocol | Description |
|---|---|---|---|
| 1025 | Microsoft RPC | TCP | Microsoft Remote Procedure Call |
| 1026-1029 | Windows Messenger | UDP | Windows Messenger popup spam |
| 1080 | SOCKS proxy | TCP (or UDP since SOCKS5) | SOCKS stands for Socket Secure. This protocol exchanges network packets between a client and server through a proxy server. |
| 1080 | MyDoom | TCP | Computer virus |
| 1194 | OpenVPN | TCP, UDP | OpenVPN |
| 1214 | KAZAA | TCP | A peer-to-peer file-sharing protocol |
| 1241 | Nessus | TCP, UDP | Nessus Security Scanner |
| 1311 | Dell OpenManage | TCP | Dell EMC OpenManage Server Administrator Web GUI |
| 1337 | WASTE | TCP | WASTE peer-to-peer encrypted file-sharing Program |
| 1589 | Cisco VQP | TCP, UDP | Cisco VLAN Query Protocol (VQP) |
| 1701 | L2TP VPN | TCP | Layer Two Tunneling Protocol Virtual Private Networking |
| 1720 | H.323 | TCP | H.323 Call Control Signaling, a VoIP call control protocol |
| 1723 | Microsoft PPTP | TCP, UDP | Point-to-Point Tunneling Protocol Virtual Private Networking |
| 1725 | Steam | UDP | Valve Steam Client uses port 1725 |
| 1741 | CiscoWorks SNMS 2000 | TCP | CiscoWorks Small Network Management Solution web server |
| 1755 | MMS | TCP, UDP | Microsoft Media Server |
| 1812 | RADIUS | UDP | RADIUS server authentication and authorization |
| 1813 | RADIUS | UDP | RADIUS server accounting |
| 1863 | (Multiple uses) | TCP, UDP | MSN Messenger, Xbox Live 360 |
| 1900 | UPnP | UDP | Universal Plug and Play |
| 1985 | Cisco HSRP | UDP | Hot Standby Router Protocol |
| 2000 | Cisco SCCP | TCP | Skinny Client Control Protocol |
| 2002 | Cisco ACS | TCP | Access Control Server |
| 2049 | NFS | UDP | Network File Sharing |
| 2082 | cPanel | TCP, UDP | cPanel default |
| 2083 | radsec, cPanel | TCP, UDP | Secure RADIUS Service ( radsec ), cPanel default SSL |
| 2100 | amiganetfs | TCP | Amiga Network Filesystem |
| 2222 | DirectAdmin | TCP | Graphical web hosting control panel |
| 2302 | Gaming | UDP | The game HALO uses this port extensively |
| 2483 | Oracle | TCP, UDP | Oracle database listening for insecure client connections to the listener, replaces port 1521 |
| 2484 | Oracle | TCP, UDP | Oracle database listening for SSL client connections to the listener |
| 2745 | Bagle.C – Bagle.H | TCP | Computer worms |
| 2967 | Symantec AV | TCP, UDP | Symantec System Center agent (SSC-AGENT) |
| 3050 | Interbase DB | TCP, UDP | Borland Interbase database |
| 3074 | XBOX Live | TCP, UDP | Gaming: Xbox LIVE and Games for Windows – Live |
| 3127 | MyDoom | TCP | Computer worm |
| 3128 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
| 3222 | GLBP | TCP, UDP | Gateway Load Balancing Protocol |
| 3260 | iSCSI Target | TCP, UDP | Microsoft iSCSI Target Server |
| 3306 | MySQL | TCP | MySQL database system |
| 3389 | RDP | TCP | Windows Remote Desktop Protocol (Microsoft Terminal Server) |
| 3689 | DAAP | TCP | Digital Audio Access Protocol, used by Apple’s iTunes and AirPort Express |
| 3690 | SVN | TCP, UDP | Apache Subversion, a version control system |
| 3724 | World of Warcraft | TCP, UDP | Some Blizzard games, Unofficial Club Penguin Disney online game for kids |
| 3784-3785 | Ventrilo VoIP | TCP, UDP | Ventrilo’s Voice over Internet Protocol program |
| 4333 | mSQL | TCP | Mini SQL server |
| 4444 | Blaster | TCP, UDP | Computer worm |
| 4500 | IPSec NAT Traversal | UDP | Internet Protocol Security Network Address Translation (NAT) Traversal |
| 4664 | Google Desktop | TCP | Google Desktop’s built-in HTTP server and indexing software |
| 4672 | eMule | UDP | Peer-to-peer file-sharing software |
| 4899 | Radmin | TCP | Remote computer control software |
| 5000 | UPnP | TCP | Universal Plug and Play |
| 5001 | iperf | TCP | Tool for measuring TCP and UDP bandwidth performance |
| 5004-5005 | RTP, RTSP | UDP | Real-time Transport Protocol, Real Time Streaming Protocol |
| 5050 | Yahoo! Messenger | TCP | Instant messaging service from Yahoo |
| 5060 | SIP | TCP, UDP | Session Initiation Protocol |
| 5061 | SIP-TLS | TCP | Session Initiation Protocol over TLS |
| 5190 | (Multiple uses) | TCP, UDP | ICQ, AIM (AOL Instant Messenger), Apple iChat |
| 5222-5223 | XMPP | TCP, UDP | Extensible Messaging and Presence Protocol Client Connection; also used in Google Talk, Jabber, Apple iChat, WhatsApp, etc. |
| 5353 | MDNS | UDP | Multicast DNS |
| 5432 | PostgreSQL | TCP | PostgreSQL database system |
| 5554 | Sasser | TCP | Computer worm |
| 5631-5632 | pcAnywhere | UDP | Symantec pcAnywhere |
| 5800 | VNC over HTTP | TCP | Virtual Network Computing (VNC) |
| 5900-5999 | RFB/VNC Server | TCP, UDP | VNC Remote Frame Buffer RFB protocol |
| 6000 | X11 | TCP | X Window System protocol for delivering payloads between X clients and servers |
| 6001 | X11 | UDP | X Window System protocol for delivering payloads between X clients and servers |
| 6112 | Diablo | TCP, UDP | Gaming |
| 6129 | DameWare | TCP | Remote access software developed by SolarWinds |
| 6257 | WinMX | UDP | Windows Music Exchange, peer-to-peer file-sharing freeware |
| 6346-6347 | Gnutella2 | TCP, UDP | Peer-to-peer network protocol |
| 6379 | Redis | TCP | Popular non-relational database management system (NoSql) |
| 6500 | GameSpy | TCP, UDP | Gaming |
| 6566 | SANE | TCP, UDP | Scanner Access Now Easy |
| 6588 | AnalogX | TCP | AnalogX proxy server |
| 6588 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
| 6665-6669 | IRC | TCP | Internet Relay Chat |
| 6679, 6697 | IRC over SSL | TCP | Internet Relay Chat |
| 6699 | Napster | TCP | Peer-to-peer file-sharing application |
| 6881-6999 | BitTorrent | TCP, UDP | BitTorrent uses this range of ports the most often |
| 6891-6901 | Windows Live Messenger | TCP, UDP | Alternatively: MSN Messenger |
| 6970 | Quicktime | TCP, UDP | QuickTime streaming server |
| 7000 | Cassandra | TCP | Inter-node communication within the cluster on Apache Cassandra |
| 7001 | Cassandra | TCP | SSL-enabled inter-node communication within the cluster on Apache Cassandra |
| 7199 | Cassandra JMX | TCP | Java Management Extensions on Apache Cassandra |
| 7648-7649 | CU-SeeMe | TCP, UDP | Internet video conferencing client made by Cornell University |
| 8000 | Internet Radio | TCP | Commonly choice of alternate HTTP port for web applications |
| 8080 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
| 8086 | Kaspersky AV | TCP | Kaspersky AV Control Center |
| 8087 | Kaspersky AV | UDP | Kaspersky AV Control Center |
| 8118 | Privoxy | TCP | Advertisement-filtering Web proxy |
| 8200 | VMware Server | TCP, UDP | VMware vSphere Fault Tolerance |
| 8222 | VMware Server | TCP, UDP | VMware Server Management User Interface (insecure Web interface). |
| 8500 | (Multiple uses) | TCP, UDP | Adobe ColdFusion, Flight Message Transfer Protocol |
| 8767 | Teamspeak | UDP | VoIP communication system for online gaming |
| 8866 | Bagle.B | TCP | Computer worm |
| 9042 | Cassandra | TCP | Apache Cassandra, a NoSql database |
| 9100 | PDL | TCP | PDL Data Stream, used for printing to certain network printers |
| 9101-9103 | Bacula | TCP, UDP | For automating backup tasks |
| 9119 | MXit | TCP, UDP | MXit Instant Messaging (deprecated) |
| 9800 | WebDAV | TCP, UDP | Web-based Distributed Authoring and Versioning, an extension of HTTP |
| 9898 | Dabber | TCP | Computer worm (Sasser) |
| 9999 | Urchin | TCP, UDP | Urchin Web Analytics |
| 10000 | (Multiple uses) | TCP, UDP | Network Data Management Protocol; applications: Webmin, BackupExec, Viatalk; gaming: The Matrix Online, Dungeon Fighter |
| 10161 | SNMP-agents (encrypted) | TCP | Simple network management protocol; agents communicate on this port |
| 10162 | SNMP-trap (encrypted) | TCP | Simple network management protocol; listens for asynchronous traps |
| 10113 | NetIQ | TCP, UDP | NetIQ Endpoint |
| 10114 | NetIQ | TCP, UDP | NetIQ Qcheck |
| 10115 | NetIQ | TCP, UDP | NetIQ Endpoint |
| 10116 | NetIQ | TCP, UDP | NetIQ VoIP Assessor |
| 11371 | OpenPGP | TCP, UDP | OpenPGP HTTP Keyserver |
| 12345 | NetBus | TCP | NetBus remote administration tool (Trojan horse) |
| 13720-13721 | NetBackup | TCP, UDP | NetBackup request daemon |
| 14567 | Battlefield | UDP | Gaming |
| 15118 | Dipnet/Oddbob | TCP | Trojan horse |
| 19226 | AdminSecure | TCP | Panda Software AdminSecure Communication Agent |
| 19638 | Ensim | TCP | Ensim Control Panel |
| 20000 | Usermin | TCP, UDP | Web email interface for regular non-root users |
| 24800 | Synergy | TCP, UDP | Keyboard/mouse sharing software |
| 25999 | Xfire | TCP | Communication tool for gamers (deprecated) |
| 27015 | Half-Life | UDP | Gaming |
| 27017 | MongoDB | TCP | NoSql database |
| 27374 | Sub7 | TCP, UDP | Trojan horse |
| 28960 | Call of Duty | TCP, UDP | Gaming |
| 31337 | Back Orifice | TCP, UDP | Remote administration tool used for Trojan horses |
| 33434+ | traceroute | UDP | Utility for displaying paths and measuring transit delays of packets across a network |
You may use these ports for custom applications free from concerns that it may clash with existing processes.
| Port number | Service |
|---|---|
| 7 | Echo |
| 20, 21 | FTP |
| 22 | SSH/SCP |
| 23 | Telnet |
| 25 | SMTP |
| 53 | DNS |
| 67, 68 | DHCP/BOOTP |
| 69 | TFTP |
| 80 | HTTP |
| 88 | Kerberos |
| 110 | POP3 |
| 123 | NTP |
| 137 | NetBIOS |
| 143 | IMAP |
| 161 | SNMP |
| 194 | IRC |
| 389 | LDAP |
| 443 | HTTPS |
| 445 | Microsoft DS SMB |
| 464 | Kerberos password settings |
| 547 | DHCPv6 |
| 596 | SMSD |
| 636 | LDAP over SSL |
| 1720 | H.323 |
| 3389 | RDP |
| 5060 | SIP |
| 5061 | SIP over TLS |
We hope that you found this cheat sheet useful. Familiarity with ports and protocols is vital to building secure applications and troubleshooting problems on computer networks. Whether you're studying or working, this cheat sheet of common network ports will help you in academic and professional settings. For further resources, or if you’re curious about how ports and protocols fit into cyber security, look into network security courses available with our StationX Accelerator Program.
What are the most common ports?
FTP: ports 20-21; SSH/SCP: port 22; HTTP: 80; HTTPS: 443; POP3: 110; POP3 over SSL: 995; IMAP: 143; IMAP over SSL: 993. We recommend you download the graphic in Well-known/System Ports.
How many common ports are there?
It depends on whether you’re referring to system ports (1024) or want to include ports registered with apps (49152) because system ports range from 0 through 1023, and registered ports span 1024 – 49151.
What are the common TCP ports?
FTP: ports 20-21; SSH/SCP: port 22; Telnet: 23; SMTP: 25; DNS: 53; HTTP: 80; POP3: 110; IMAP: 143; HTTPS: 443.
What are common open ports?
FTP: port 21; SSH/SCP: 22; Telnet: 23; SMTP: 25; DNS: 53; POP3: 110; IMAP: 145; HTTP: 80; HTTPS: 443; MySQL: 3306; RDP: 3389; VNC: 5900.
What are the three types of ports?
The following are the three types of ports with corresponding port number ranges:
• Well-known/System ports: 0 – 1023
• Registered ports: 1024 – 49151
• Dynamic/Private ports: 49152 – 65535
