WebSphere creates a file called "AboutThisProfile.txt" under \IBM\WebSphere\AppServer\profiles\<profileName>\logs folder. This file contains
various port numbers. The one you are looking for is "HTTP transport port".
Administrative console port: xxxx
Administrative console secure port: xxxx
HTTP transport port: xxxx
HTTPS transport port: xxxx
Bootstrap port: xxxx
SOAP connector port: xxxx
Is this what you were looking for ?