773 - System Port | Service Name:submit

773 is a System Port. Transport Protocol TCP , 773 Service Name submit, Service Name Description: .

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

Port	Service Name	Description
1488	docstor	DocStor
2511	metastorm	Metastorm
2946	fjsvmpor	FJSVmpor
3287	directvdata	DIRECTVDATA
3435	pacom	Pacom Security User Port
3670	smile	SMILE TCP/UDP Interface
3943	tig	TetraNode Ip Gateway
4050	cisco-wafs	Wide Area File Services
4097	patrolview	Patrol View
4279	vrml-multi-use	VRML Multi User Systems

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