I think we may be confusing Prime DN's with DIDs.
The system doesn't show what DID numbers you own. All it will show you is what you have programmed. Even then, that means it will only show you the last X digits of the number. Not the entire DID number. For example, your DID 0395687000, may actually be programmed in your system as 7000.
The only way to get this information is to contact your carrier and ask them what your DID range(s) are.
Ralph