655 TINC - System Port | Service Name:tinc

655 is a System Port. Transport Protocol TCP UDP , 655 Service Name tinc, Service Name Description: TINC.

Port	Protocol	Service Name	Description	Source
655	TCP UDP	tinc	TINC	IANA
655	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
655	TCP UDP	tinc	TINC	bekkoame

Port	Service Name	Description
982		Unassigned
1918	can-nds	IBM Tivole Directory Service - NDS
2241	ivsd	IVS Daemon
2448	hpppssvr	hpppsvr
2860	dialpad-voice1	Dialpad Voice 1
2900	quicksuite	QUICKSUITE
3128	ndl-aas	Active API Server Port
3786	upstriggervsw	VSW Upstrigger port
3971	lanrevserver	LANrev Server
4647		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