1000 - System Port | Service Name:cadlock2

1000 is a System Port. Transport Protocol TCP , 1000 Service Name cadlock2, Service Name Description: .

Port	Protocol	Service Name	Description	Source
1000	TCP	cadlock2		IANA
1000	UDP	cadlock2		IANA
1000	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
1000	TCP		Der Spaeher 3	emsisoft
1000	TCP		DerSpaeher, Direct Connection	anti-trojan
1000			Der Spher / Der Spaeher	sans.org
1000			Der Späher / Der Spaeher, Direct Connection, GOTHIC Intruder , Theef	simovits.com
1000	TCP		Der Spaher / Der Spaeher, Direct Connection, Nibu	bekkoame
1000	TCP UDP	cadlock2		bekkoame

Port	Service Name	Description
1816	harp	HARP
2569	sonuscallsig	Sonus Call Signal
3172	serverview-rm	SERVERVIEW-RM
3250	hicp	HMS hicp port
3839	amx-rms	AMX Resource Management Suite
4296	vrml-multi-use	VRML Multi User Systems
5146	social-alarm	Social Alarm Service
5191	aol-1	AmericaOnline1
5438		Unassigned
6137		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