525 timeserver - System Port | Service Name:timed

525 is a System Port. Transport Protocol TCP UDP , 525 Service Name timed, Service Name Description: timeserver.

Port	Protocol	Service Name	Description	Source
525	TCP UDP	timed	timeserver	IANA
525	UDP		Timed, Timeserver,Official	wikipedia
525	TCP UDP	timed	timeserver	bekkoame

Port	Service Name	Description
639	msdp	MSDP
691	msexch-routing	MS Exchange Routing
961		Unassigned
1460	proshare2	Proshare Notebook Application
1492	stone-design-1	stone-design-1
1654	stargatealerts	stargatealerts
1893	elad	ELAD Protocol
3945	emcads	EMCADS Server Port
4605		Unassigned
5636	sfm-db-server	SFMdb - SFM DB server

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