Port 525 timeserver - System Port

Port 525 is a System Port. Transport Protocol TCP UDP , Port 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
659		Removed
1016		Reserved
1331	intersan	intersan
1702	deskshare	deskshare
2359	flukeserver	FlukeServer
2433	codasrv-se	codasrv-se
2991	wkstn-mon	WKSTN-MON
3379	socorfs	SOCORFS
5102	oms-nonsecure	Oracle OMS non-secure
5179		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