624 Crypto Admin - System Port | Service Name:cryptoadmin

624 is a System Port. Transport Protocol TCP UDP , 624 Service Name cryptoadmin, Service Name Description: Crypto Admin.

Port	Protocol	Service Name	Description	Source
624	TCP UDP	cryptoadmin	Crypto Admin	IANA
624	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
624	TCP UDP	cryptoadmin	Crypto Admin	bekkoame

Port	Service Name	Description
251		Reserved
898		Unassigned
1048	neod2	Sun's NEO Object Request Broker
3544	teredo	Teredo Port
3663	dtp	DIRECWAY Tunnel Protocol
5471		Unassigned
6829		Unassigned
7369		Unassigned
7547	cwmp	DSL Forum CWMP
8746		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