1382 udt_os IANA assigned this well-formed service name as a replacement for "udt_os". - User Port

1382 is a User Port. Transport Protocol TCP UDP , 1382 Service Name udt-os, Service Name Description: udt_os IANA assigned this well-formed service name as a replacement for "udt_os"..

Port	Protocol	Service Name	Description	Source
1382	TCP UDP	udt-os	udt_os IANA assigned this well-formed service name as a replacement for "udt_os".	IANA
1382	TCP UDP	udt_os	udt_os	IANA
1382	TCP UDP	udt_os	udt_os	bekkoame

Port	Service Name	Description
1581	mil-2045-47001	MIL-2045-47001
2101	rtcm-sc104	rtcm-sc104
3518	artifact-msg	Artifact Message Server
3606	splitlock	Splitlock Server
3720	ufastro-instr	UF Astro. Instr. Services
3977	opswmanager	Opsware Manager
5238		Unassigned
6779		Unassigned
7774		Unassigned
8133		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