Search common network ports by number or by service name and see what runs on each one, whether it uses TCP, UDP or both, and a short note about the service. Type 443 to find HTTPS, or type a word like mail, database or ssh to list every related port. Ports are how a single machine keeps many services apart, and remembering which number belongs to which service is a constant small friction when reading firewall rules, configuring servers or diagnosing a connection that will not open. This reference covers the well known and widely used registered ports for web, email, file transfer, remote access, databases, DNS and more. Everything is built into the page, so the lookup is instant and works with no internet connection. Nothing you search for is transmitted, since there are no lookups against any server.
It covers common well known and registered TCP and UDP ports, such as 22 for SSH, 80 for HTTP and 443 for HTTPS.
Yes, search by a service name like DNS or SMTP to find its port, or by a port number to find the service.
Yes, each entry notes the transport protocol so you know whether a service uses TCP, UDP or both.
Search common network ports by number or by service name and see what runs on each one, whether it uses TCP, UDP or both, and a short note about the service. Type 443 to find HTTPS, or type a word like mail, database or ssh to list every related port.
Yes. Well Known Ports Lookup is completely free, with no sign-up and no usage limits.
Yes. Well Known Ports Lookup runs in any modern web browser. There is nothing to download or install.
Yes. Well Known Ports Lookup runs entirely on your device in your browser, so nothing you enter is uploaded to a server.