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← Area code 412

412-423 phone numbers

Numbers 412-423-0000 to 412-423-9999 are assigned to Fidium Enterprise Services, LLC (rate centre PTGSBNZN20, PA, NANPA abbreviation). 8 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.

Reported numbers in 412-423