In most cases, the Oracle Database component's port number is listed in the tool used to configure the port.

• Ports for some Oracle Database applications are listed in the portlist.ini file. This file is located in the directory %ORACLE_HOME%\install.
• If you change a port number after installation, then it is not updated in the portlist.ini file, so you can rely on this file only immediately after installation.
• To find or change a port number, use the methods described in this appendix.