← Area code 657
657-364 phone numbers
Numbers 657-364-0000 to 657-364-9999 are assigned to Verizon Wireless (rate centre WESTMINSTR, CA, NANPA abbreviation). 4 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.