412-437 phone numbers

Numbers 412-437-0000 to 412-437-9999 are assigned to Level 3 Communications, LLC (rate centre PTTSBGZON6, PA, NANPA abbreviation). 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 412-437-0xxx, 412-437-1xxx, 412-437-4xxx, 412-437-5xxx, 412-437-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 412-437