Section 7940 Of Chapter 3.5. New Area Codes From California Public Utilities Code >> Division 4. >> Chapter 3.5.

. A telephone corporation doing business in this state that possesses one or more telephone number prefixes, or portions thereof, shall provide to the commission or its agent, upon request, use information pertaining to both those prefixes in use and those prefixes not in use, according to any schedule established by the commission.