530 rpc - System Port | Service Name:courier

530 is a System Port. Transport Protocol TCP UDP , 530 Service Name courier, Service Name Description: rpc.

Port	Protocol	Service Name	Description	Source
530	TCP UDP	courier	rpc	IANA
530	TCP UDP		RPC,Official	wikipedia
530	TCP UDP	courier	rpc	bekkoame

Port	Service Name	Description
1638	ismc	ISP shared management control
2143	lv-jc	Live Vault Job Control
2589	quartus-tcl	quartus tcl
3160	tip-app-server	TIP Application Server
3480	plethora	Secure Virtual Workspace
3517	802-11-iapp	IEEE 802.11 WLANs WG IAPP
4429	omviagent	OMV Investigation Agent-Server
4652		Unassigned
4798		Unassigned
4942	eq-office-4942	Equitrac Office

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