489 nest-protocol - System Port | Service Name:nest-protocol

489 is a System Port. Transport Protocol TCP UDP , 489 Service Name nest-protocol, Service Name Description: nest-protocol.

Port	Protocol	Service Name	Description	Source
489	TCP UDP	nest-protocol	nest-protocol	IANA
489	TCP UDP	nest-protocol	nest-protocol	bekkoame

Port	Service Name	Description
1021	exp1	RFC3692-style Experiment 1
1710	impera	impera
2634	pk-electronics	PK Electronics
3160	tip-app-server	TIP Application Server
4739	ipfix	IP Flow Info Export
5384		Unassigned
6772		Unassigned
7510	ovhpas	HP OpenView Application Server
7696		Unassigned
8680		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