6046 X Window System - User Port

6046 is a User Port. Transport Protocol TCP UDP , 6046 Service Name x11, Service Name Description: X Window System.

Port	Protocol	Service Name	Description	Source
6046	TCP UDP	x11	X Window System	IANA

Port	Service Name	Description
408	prm-sm	Prospero Resource Manager Sys. Man.
429	ocs-amu	OCS_AMU IANA assigned this well-formed service name as a replacement for "ocs_amu".
1444	marcam-lm	Marcam License Management
1716	xmsg	xmsg
2651	ebinsite	EBInSite
4727	fcis	F-Link Client Information Service
4823		Unassigned
5037		Unassigned
5262		Unassigned
5557	farenet	Sandlab FARENET

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