770 - System Port | Service Name:cadlock

770 is a System Port. Transport Protocol TCP , 770 Service Name cadlock, Service Name Description: .

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

Port	Service Name	Description
658	tenfold	TenFold
688	realm-rusd	ApplianceWare managment protocol
1611	ill	Inter Library Loan
1666	netview-aix-6	netview-aix-6
1714	sesi-lm	sesi-lm
2439	sybasedbsynch	SybaseDBSynch
3161	doc1lm	DOC1 License Manager
4728	capmux	CA Port Multiplexer
5892		Unassigned
5923		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