912 APEX relay-relay service - System Port

912 is a System Port. Transport Protocol TCP UDP , 912 Service Name apex-mesh, Service Name Description: APEX relay-relay service.

Port	Protocol	Service Name	Description	Source
912	TCP UDP	apex-mesh	APEX relay-relay service	IANA
912	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
912	TCP UDP	apex-mesh	APEX relay-relay service	bekkoame

Port	Service Name	Description
1521	ncube-lm	nCube License Manager
1559	web2host	web2host
2251	dif-port	Distributed Framework Port
5185		Unassigned
6742		Unassigned
7255		Unassigned
7354	swx	The Swiss Exchange
7817		Unassigned
10133		Unassigned
10338		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