Port 13

Port 13 is used for the Daytime Protocol, which returns the current date and time as a human-readable ASCII string. This protocol is mainly used for debugging purposes and is not commonly used on modern networks.

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 13
tcp
daytime
Daytime (RFC 867)
WELL KNOWN PORT
Port 13
udp
daytime
Daytime (RFC 867)
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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