8837 Unassigned - User Port

8837 is a User Port. Transport Protocol , 8837 Service Name , Service Name Description: Unassigned.

Port	Protocol	Description	Source
8837		Unassigned	IANA
8837	TCP UDP	EMC2 (Legato) Networker or Sun Solstice Backup,Official	wikipedia
8837	UDP	QuickTime Streaming Server	Apple.com
8837	TCP	Web service, iTunes Radio streams	Apple.com

Port	Service Name	Description
3703	adobeserver-3	Adobe Server 3
3770	cindycollab	Cinderella Collaboration
4150	PowerAlert-nsa	PowerAlert Network Shutdown Agent
4299	vrml-multi-use	VRML Multi User Systems
5578		Unassigned
6046	x11	X Window System
7660		Unassigned
7747	prgp	Put/Run/Get Protocol
9237		Unassigned
9952	apc-9952	APC 9952

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