ORACLE TNS DEFAULT PORTS

1521 :
Default port for the TNS Listener. This port number may change in the future as Oracle has officially registered ports 2483 and 2484 (SSL).
1522 – 1540:
Commonly used ports for the TNS Listener 1575 Default port for the Oracle Names Server
1630:
Default port for the Oracle Connection Manager – client connections
1830:
Default port for the Oracle Connection Manager – administrative connections
2481:
Default port for Oracle JServer/JVM listener 2482 Default port for Oracle JServer/JVM listener using SSL
2483:
New officially registered port for the TNS Listener 2484 New officially registered port for the TNS Listener using SSL