Up to 20 distinct random port numbers in a chosen range, with ports 0–1023 excluded by default.
Common Ports Reference
Runs locally
Use Common Ports Reference
What it does
Search 40 well-known TCP and UDP ports by number or service name. Useful when a mail log, a scan result or a phishing URL shows a port you need to place.
It runs entirely in your browser: nothing you enter is uploaded.
Example
Search for smtp
smtpPORT SERVICE PROTOCOL
25 SMTP TCP
465 SMTPS TCP
587 SMTP Submission TCPShows 25 (SMTP), 465 (SMTPS) and 587 (SMTP Submission), the ports used for relaying and submitting mail.
FAQ
What does the table cover?
40 common ports with service and protocol, such as 22 (SSH), 53 (DNS), 443 (HTTPS), 3389 (RDP) and 27017 (MongoDB). The search matches any part of the port number or the service name, so 443 also finds 8443.
Can I rely on a port to identify a service?
No. Ports are conventions: any service can listen on any port, so a phishing page on :8443 or an admin panel on an odd port is not explained by the table. It is also a short list, not the IANA Service Name and Transport Protocol Port Number Registry.
Does the tool scan or contact anything?
No. It is a static table filtered in your browser; no connections are made.