Port Reference

What the Port Reference is

Network ports are the numbered endpoints that let a single machine run many services at once. When you connect to a website, send email, or open a database connection, the port number tells the operating system which service should handle the traffic. This reference lists the well-known and commonly used TCP and UDP ports together with the service that conventionally runs there and a short description of what it does. The list is searchable: type a port number, a service name, or a keyword and the table filters instantly to the matching rows so you do not have to scroll through everything.

How to use it

Reach for this table whenever you encounter a port number you do not recognise — in a firewall rule, a log line, a netstat output, a security scan, or a configuration file. Searching for 22 confirms SSH, 443 confirms HTTPS, and searching for a name like mysql or redis jumps straight to the database port you need. It is equally useful when configuring a service: you can check the conventional port to open, decide whether you need TCP, UDP, or both, and document the choice for teammates. Remember that ports are conventions, not guarantees — administrators can and do run services on non-standard ports, so always confirm against the actual configuration.

Scope and privacy

This is a curated quick-reference covering the services most people look up, not the complete registry; the authoritative and exhaustive list of port assignments is maintained by IANA. The data is embedded directly in the page, and both the table and the search filter run entirely with in-browser JavaScript. Nothing you type is uploaded, and the tool makes no external API calls. That means you can look up ports while planning internal infrastructure without sending any of your queries to a third party. Use it as a memory aid and a starting point, and consult the official registry or your software's documentation when you need authoritative detail.