564 plan 9 file service - System Port

564 is a System Port. Transport Protocol TCP UDP , 564 Service Name 9pfs, Service Name Description: plan 9 file service.

Port	Protocol	Service Name	Description	Source
564	TCP UDP	9pfs	plan 9 file service	IANA
564			Oracle	simovits.com
564	TCP UDP	9pfs	plan 9 file service	bekkoame

Port	Service Name	Description
317	zannet	Zannet
1147	capioverlan	CAPIoverLAN
1706	jetform	jetform
4093	pvxpluscs	Pvx Plus CS Host
4858		Unassigned
5698		Unassigned
5733		Unassigned
5874		Unassigned
6135		Unassigned
6231		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