Port 5039 Unassigned - User Port

Port 5039 is a User Port. Transport Protocol , Port 5039 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
5039			Unassigned	IANA

Port	Service Name	Description
970		Unassigned
2179	vmrdp	Microsoft RDP for virtual machines
2212	leecoposserver	LeeCO POS Server Service
2345	dbm	dbm
2402	taskmaster2000	TaskMaster 2000 Server
3661	can-ferret-ssl	IBM Tivoli Directory Service using SSL
3725	na-er-tip	Netia NA-ER Port
4611		Unassigned
7098		Unassigned
8091	jamlink	Jam Link Framework

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