Skype - caller id - for a landline number, is it possible?

Question

Skype

The goal is to show your office number when calling from Skype to an external number of a client.
To set up the display of your number during an outgoing call from Skype, you need to go to your account and click "caller id". To check the number that it is mine, an SMS comes to the number that I entered.
And how to check not a mobile, but an existing city (office) number?