5552 Unassigned - User Port

5552 is a User Port. Transport Protocol , 5552 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
5552			Unassigned	IANA
5552	TCP UDP		Unassigned	bekkoame

Port	Service Name	Description
4916		Unassigned
5886		Unassigned
6118	tipc	Transparent Inter Process Communication
6501	boks-servc	BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc".
6835		Unassigned
7177		Unassigned
7392	mrssrendezvous	mrss-rendezvous server
7678		Unassigned
8216		Unassigned
8239		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