Port 503 Intrinsa - System Port | Service Name:intrinsa

Port 503 is a System Port. Transport Protocol TCP UDP , Port 503 Service Name intrinsa, Service Name Description: Intrinsa.

Port	Protocol	Service Name	Description	Source
503	TCP UDP	intrinsa	Intrinsa	IANA
503	TCP UDP	intrinsa	Intrinsa	bekkoame

Port	Service Name	Description
945		Unassigned
1469	aal-lm	Active Analysis Limited License Manager
1969	lipsinc1	LIPSinc 1
2165	x-bone-api	X-Bone API
2648	upsnotifyprot	Upsnotifyprot
3762	gbs-smp	GBS SnapMail Protocol
4617		Unassigned
5251	caevms	CA eTrust VM Service
7369		Unassigned
7649		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