Oracle Corporations recommends the following port numbers for TCP/IP and TCP/IP with SSL protocol addresses:

Port	Protocol	Description
1521	TCP/IP	Default listening port for client connections to the listener.
2481	TCP/IP	Recommended and officially registered listening port for client connections to the Oracle8i JServer option.
2482	TCP/IP with SSL	Recommended and officially registered listening port for client connections to the Oracle8i JServer option.
1575	TCP/IP or TCP/IP with SSL	Default and officially registered listening port for a client connection to an Oracle Names server.
1630	TCP/IP	Default and officially registered listening port for client connections to Oracle Connection Manager.
1830	TCP/IP	Default and officially registered listening port for administrative commands to Oracle Connection Manager.