Port Number Lookup
Look up any TCP/UDP port number to see its standard service name, protocol, and common use cases — covers well-known, registered, and dynamic ranges.
100% client-side · no upload
How to use
- Enter any port number between 0 and 65535.
- Click Look up port to see the standard service, protocol, and description.
- Use this to identify open ports on a server, troubleshoot firewall rules, or understand network scan results.
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Frequently Asked Questions
- Is this port lookup free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. The port database is embedded in the page and all lookups run locally in JavaScript.
- Does it work on mobile?
- Yes. The tool is mobile-first and works on iPhone Safari and Android Chrome.
Last updated: By jarvisbox