← Area code 925
925-817 phone numbers
Numbers 925-817-0000 to 925-817-9999 are assigned to Pacific Bell (rate centre WALNUT CRK, CA, NANPA abbreviation). 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.