Look up common TCP and UDP port numbers or find a port by service name.
Port
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Service
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Protocol
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Enter the example value or paste your own input, choose the mode when one is available, and read the first result card for the direct answer. The output area gives a copyable block for code reviews, documentation, API tests, classwork or troubleshooting notes.
What the result means
The local lookup table covers common web, mail, DNS, database and remote access ports used in examples.
What is not included
This is not a live IANA registry lookup. Rare, vendor-specific and custom application ports may be absent.
Privacy note
The calculation runs in your browser. Avoid pasting production secrets, credentials, private keys, customer data or regulated personal data unless your own policy allows browser-based tools.