Network port reference

Look up registered services and protocols.

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Updated 2026-09-20

Network port reference explained

Search IANA service-name and port-number assignments without connecting to a host. Numeric queries also match registered port ranges, and the transport filter distinguishes TCP from UDP and other protocols.

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A worked example

Port 443 returns registered HTTPS assignments. Selecting TCP narrows the result to that transport rather than assuming all protocols use the port identically.

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A registry is not a network scanner or a firewall recommendation. Services may run on different ports. Broad searches show the first 100 matches with the full match count so truncation is explicit.

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ToolOctopus. “Network port reference.” Updated 2026-09-20. https://tooloctopus.com/network-port-reference.

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