Finding a user's list of extensions

Version 1
    This document was generated from CDN thread

    Created by: Tim Peterson on 25-05-2011 11:06:58 AM
    Hello to the group...
    I'm building a simple app to look up a provided userId's extensions assigned to their phone.
    I am able to see the primary extension in the user object but any other extensions do not seem to be available in either the user object or the device profile object referenced in the user's associated devices.
    I've looked at the lines that come back within the device profile but the extensions are not listed.
    Can anyone suggest an object too pull that might have the extension numbers listed for a given user or device?
    Many thanks and sorry for my unfamiliarity with the object architecture.... I just started with it.