Motorola RAZR V3

Whenever I get a call that I don't have the number set up as a contact, I always get the number in this format: "1-972-XXX-XXXX". On my old phone with Sprint, I would get the same only without the "1". Can this be done with this phone and/or is it a Cingular issue? Any help that keeps me from calling tech support would be greatly appreciated.

THANKS