125 Locus PC-Interface Net Map Ser - System Port

125 is a System Port. Transport Protocol TCP UDP , 125 Service Name locus-map, Service Name Description: Locus PC-Interface Net Map Ser.

Port	Protocol	Service Name	Description	Source
125	TCP UDP	locus-map	Locus PC-Interface Net Map Ser	IANA
125	TCP UDP	locus-map	Locus PC-Interface Net Map Ser	bekkoame

Port	Service Name	Description
1094	rootd	ROOTD
2124	elatelink	ELATELINK
2468	qip-msgd	qip_msgd
3127	ctx-bridge	CTX Bridge Port
3404		Removed
4023	esnm-zoning	ESNM Zoning Port
4063	ice-router	Ice Firewall Traversal Service (TCP)
4270	vrml-multi-use	VRML Multi User Systems
4333		Unassigned
5472		Unassigned

A port is an endpoint of communication in an operating system. While the term is also used for hardware devices, in software it is a logical construct that identifies a specific process or a type of service.

Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535);

The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023.
DYNAMIC AND/OR PRIVATE PORTS Registered Ports are those from 1024 through 49151.
The Dynamic and/or Private Ports are those from 49152 through 65535