Common Ports Reference
Look up well-known TCP/UDP port numbers and services.
How to use
- 1 Enter a port number to identify its service and IANA range.
- 2 Or type a keyword to search services and descriptions.
- 3 Read the matching rows in the reference table.
- 4 Copy the filtered table for your notes or ticket.
About Common Ports Reference
The Common Ports Reference is a quick lookup table for the network ports you bump into while configuring firewalls, reading scan results or debugging a stubborn connection.
Type a port number to see which well-known service it belongs to and which IANA range it falls into — well-known (0–1023), registered (1024–49151) or dynamic/ephemeral (49152–65535).
You can also search the whole table by service name or description, so typing "database" surfaces MySQL, PostgreSQL, MongoDB and friends, while "mail" brings up SMTP, IMAP and POP3 with their secure variants.
Each row shows the port, the transport protocol it typically uses (TCP, UDP or both), a short service identifier and a plain-language description of its purpose.
The table covers the ports most people actually need day to day: SSH, HTTP and HTTPS, DNS, the email stack, remote-desktop and VNC, the major databases, message brokers and common proxies.
Everything runs locally in your browser with no lookups sent anywhere, so it works offline and keeps your queries private.
Use it as a fast sanity check before opening a firewall rule or to decode an unfamiliar number in an nmap report.
FAQ
What are the three IANA port ranges?
Well-known ports run 0–1023 (assigned to core services), registered ports 1024–49151 (vendor services), and dynamic or ephemeral ports 49152–65535 (used for outbound client connections).
Does a port number guarantee which service is running?
No. Ports are conventions, not rules — any service can listen on any free port. The table shows the typical assignment, but always confirm with a scan or the host configuration.