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

Port 489 is a System Port. Transport Protocol TCP UDP , Port 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
874		Unassigned
2113	hsl-storm	HSL StoRM
2592	netrek	netrek
2929	amx-webadmin	AMX-WEBADMIN
3017	event-listener	Event Listener IANA assigned this well-formed service name as a replacement for "event_listener".
4070	tripe	Trivial IP Encryption (TrIPE)
4554	msfrs	MS FRS Replication
4616		Unassigned
4904		Unassigned
5118		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