752 - System Port | Service Name:qrh

752 is a System Port. Transport Protocol TCP , 752 Service Name qrh, Service Name Description: .

Port	Protocol	Service Name	Description	Source
752	TCP	qrh		IANA
752	UDP	qrh		IANA
752	UDP		passwd_server, Kerberos Password (kpasswd) server,Unofficial	wikipedia
752	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
752	TCP UDP	qrh		bekkoame

Port	Service Name	Description
292		Unassigned
481	ph	Ph service
1679	darcorp-lm	darcorp-lm
2135	gris	Grid Resource Information Server
3063	ncadg-ip-udp	ncadg-ip-udp
4282	vrml-multi-use	VRML Multi User Systems
6881		Unassigned
7555		Unassigned
9553		Unassigned
9690		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