// REFERENCE
Port 37 (Time Protocol)
Protocol: TCP/UDP
Service: Time
Low risk
An old time protocol (RFC 868), predating NTP. It returns seconds since 1900. Largely obsolete; today NTP (123) is used.
Related tools
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Related
67
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Assignments per the IANA port registry. Educational content.