Port 621

Modified by:

Port 621 is commonly used by the macOS Server app for FileMaker Pro sharing. It is also used for HOF (Highly Optimized File) transfers in the HOF protocol.

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.

Official

Port
Protocol (TCP/UDP)
Title
Description
Port Type
Port 621
tcp
escp-ip
ESCP
WELL KNOWN PORT
Port 621
udp
escp-ip
ESCP
WELL KNOWN PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
TCP UDP Ports
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