Reference
Port Lookup
Search TCP/UDP ports by number, protocol name, or service
What's a port? If an IP address is a building's street address, a port number is the apartment number inside. Port 80 = web, port 443 = secure web, port 22 = SSH remote access.
Every service runs on a specific port.
| Port | Service | Transport | Description |
|---|---|---|---|
| 20 | FTP Data | TCP | File transfer data channel |
| 21 | FTP Control | TCP | File transfer commands |
| 22 | SSH | TCP | Secure Shell encrypted remote access |
| 23 | Telnet | TCP | Unencrypted remote access (legacy) |
| 25 | SMTP | TCP | Simple Mail Transfer Protocol |
| 49 | TACACS+ | TCP | AAA authentication (Cisco) |
| 53 | DNS | TCP/UDP | Domain Name System |
| 93 | LWRP | TCP | Livewire Routing Protocol — source/destination routing, GPIO control (Axia/Telos) |
| 67 | DHCP Server | UDP | Dynamic Host Config (server) |
| 68 | DHCP Client | UDP | Dynamic Host Config (client) |
| 69 | TFTP | UDP | Trivial File Transfer Protocol |
| 80 | HTTP | TCP | Web traffic (unencrypted) |
| 88 | Kerberos | TCP/UDP | Authentication (Active Directory) |
| 110 | POP3 | TCP | Email retrieval |
| 123 | NTP | UDP | Network Time Protocol |
| 319 | PTP Event | UDP | IEEE 1588 PTP clock sync — time-critical event messages (AES67/AoIP) |
| 320 | PTP General | UDP | IEEE 1588 PTP clock sync — announce and management messages (AES67/AoIP) |
| 143 | IMAP | TCP | Email (server-stored) |
| 161 | SNMP | UDP | SNMP queries |
| 162 | SNMP Trap | UDP | SNMP trap notifications |
| 389 | LDAP | TCP/UDP | Directory services |
| 443 | HTTPS | TCP | Encrypted web (TLS/SSL) |
| 445 | SMB | TCP | File sharing (Windows) |
| 514 | Syslog | UDP | System logging |
| 546 | DHCPv6 Client | UDP | DHCP for IPv6 (client) |
| 547 | DHCPv6 Server | UDP | DHCP for IPv6 (server) |
| 587 | SMTP Submission | TCP | Email submission with auth |
| 636 | LDAPS | TCP | LDAP over SSL |
| 993 | IMAPS | TCP | IMAP over SSL |
| 995 | POP3S | TCP | POP3 over SSL |
| 1433 | MS-SQL | TCP | Microsoft SQL Server |
| 1521 | Oracle DB | TCP | Oracle database |
| 1812 | RADIUS Auth | UDP | RADIUS authentication |
| 1813 | RADIUS Acct | UDP | RADIUS accounting |
| 2049 | NFS | TCP/UDP | Network File System |
| 3212 | NMOS IS-04 | TCP | AES67 / ST 2110 device discovery and registration |
| 3306 | MySQL | TCP | MySQL database |
| 3389 | RDP | TCP | Remote Desktop Protocol |
| 4010 | LWCP | TCP | Livewire Console Protocol — VMix, fader/bus, AES67 mixing control (Axia/Telos) |
| 4789 | VXLAN | UDP | VXLAN encapsulation (IANA assigned) |
| 5004 | RTP / Livewire Audio | UDP | RTP audio stream delivery — Livewire and AES67 multicast audio |
| 5060 | SIP | TCP/UDP | VoIP signaling |
| 5061 | SIPS | TCP | SIP over TLS |
| 5432 | PostgreSQL | TCP | PostgreSQL database |
| 8080 | HTTP Alt | TCP | Alternative HTTP / proxy |
| 8443 | HTTPS Alt | TCP | Alternative HTTPS |
| 9875 | SAP | UDP | Session Announcement Protocol — AES67 stream advertisement (multicast) |
| 10000 | NDMP | TCP | Network Data Management Protocol |