TCP/UDP Ports List - 6521 (TCP/UDP)

6521 Unassigned

6521 is a User Port. Transport Protocol , 6521 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
6521			Unassigned	IANA
6521			Oracle	simovits.com

Port	Service Name	Description
2086	gnunet	GNUnet
3328	egptlm	Eaglepoint License Manager
3832	xxnetserver	xxNETserver
4325	geognosisman	Cadcorp GeognoSIS Manager Service
5827		Unassigned
6172		Unassigned
7043		Unassigned
7927		Unassigned
8376	cruise-enum	Cruise ENUM
8756		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