412-543 phone numbers

Numbers 412-543-0000 to 412-543-9999 are assigned to Onvoy Spectrum, LLC (rate centre PTGSBNZN11, PA, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 412-543-0xxx, 412-543-1xxx, 412-543-4xxx, 412-543-5xxx, 412-543-9xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 412-543