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
976		Unassigned
999	garcon
2017	cypress-stat
2065	dlsrpn	Data Link Switch Read Port Number
2196		Unassigned
2661	olhost	OLHOST
3009	pxc-ntfy	PXC-NTFY
3719	itelserverport	iTel Server Port
5110		Unassigned
5581	tmosms1	T-Mobile SMS Protocol Message 1

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