1403 Prospero Resource Manager - User Port

1403 is a User Port. Transport Protocol TCP UDP , 1403 Service Name prm-nm-np, Service Name Description: Prospero Resource Manager.

Port	Protocol	Service Name	Description	Source
1403	TCP UDP	prm-nm-np	Prospero Resource Manager	IANA
1403	TCP UDP	prm-nm-np	Prospero Resource Manager	bekkoame

Port	Service Name	Description
177	xdmcp	X Display Manager Control Protocol
1808	oracle-vp2	Oracle-VP2
1888	ncconfig	NC Config Port
2217	gotodevice	GoToDevice Device Management
2395	lan900-remote	LAN900 Remote IANA assigned this well-formed service name as a replacement for "lan900_remote".
3880	igrs	IGRS
4259	vrml-multi-use	VRML Multi User Systems
4356	qsnet-assist	QSNet Assistant
4865		Unassigned
4912	lutap	Technicolor LUT Access Protocol

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