PD - No it is not possible because ports can only be opened in use by one application at one time. You can do a netstat -anob > netstat.out and then read the netstat.out to see which binary has which port open to get a "picture" of this behavior. Thanks, Chris Taylor Sr. Oracle DBA Ingram Barge Company Nashville, TN 37205 Office: 615-517-3355 Cell: 615-663-1673 Email: chris.taylor@xxxxxxxxxxxxxxx CONFIDENTIALITY NOTICE: This e-mail and any attachments are confidential and may also be privileged. If you are not the named recipient, please notify the sender immediately and delete the contents of this message without disclosing the contents to anyone, using them for any purpose, or storing or copying the information on any medium. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of P D Sent: Tuesday, October 11, 2011 10:07 AM To: oracle-l@xxxxxxxxxxxxx Subject: Seperate listeners on same IP/port? Is it possible to have different listeners (different names) listening on the same server/IP and the same port? Will that cause conflict? Each listener has a different set of databases listed under it. -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l