← Area code 412
412-839 phone numbers
Numbers 412-839-0000 to 412-839-9999 are assigned to Htc Communications (rate centre PTGSBNZN13, PA, NANPA abbreviation). 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 412-839-2xxx, 412-839-3xxx, 412-839-4xxx, 412-839-5xxx, 412-839-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.