← Area code 412
412-577 phone numbers
Numbers 412-577-0000 to 412-577-9999 are assigned to Verizon Pennsylvania, Inc. (rate centre PTTSBGZON1, PA, NANPA abbreviation). 3 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.