Well-Known Port Lookup

Search 60+ common TCP/UDP ports to instantly see which service uses a port.

Search port or service:

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How to use

Type a port number or service name to filter the reference table.

What port does HTTPS use?

443 (TCP). HTTP is 80, SSH is 22, FTP is 21, DNS is 53.

Why is my app's port already in use?

Search the port here to see which well-known service normally claims it, then pick a free high port above 1024.

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