https://forums.oracle.com/ords/r/apexds/community/q?question=can-not-able-to-create-listener-via-netca-with-1521-port-6527
Can not able to create listener via netca with 1521 port - Oracle Forums
Aug 18, 2015 - , Hello, I try to create listener via netca, but unfortunately get message "Use another port number " could you please help out in this matter. Regards, Ahmed.