669 MeRegister - System Port | Service Name:meregister

669 is a System Port. Transport Protocol TCP UDP , 669 Service Name meregister, Service Name Description: MeRegister.

Port	Protocol	Service Name	Description	Source
669	TCP UDP	meregister	MeRegister	IANA
669	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
669	TCP		DP Trojan	emsisoft
669	TCP		DP trojan	anti-trojan
669			DP trojan	sans.org
669			DP trojan , SniperNet	simovits.com
669	TCP		DP trojan	bekkoame
669	TCP UDP	meregister	MeRegister	bekkoame

Port	Service Name	Description
1478	ms-sna-base	ms-sna-base
1641	invision	InVision
2046	sdfunc
2090	lrp	Load Report Protocol
2614	neveroffline	Never Offline
2675	ttc-etap	TTC ETAP
6006	x11	X Window System
6091		Unassigned
6363	ndn	Named Data Networking
8621		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