About this tool
Look up common TCP and UDP port numbers and the services that use them. Filter by port number, protocol or service name — all instantly and in your browser.
Frequently asked questions
Where do these ports come from?
They are the widely-used, IANA-registered well-known and common service ports such as 22 for SSH, 443 for HTTPS and 3306 for MySQL.
Can I search by service?
Yes — type a number like 443 or a name like redis and the list filters as you type.