920-528 phone numbers

Numbers 920-528-0000 to 920-528-9999 are assigned to Frontier North Inc. in Cascade, WI. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 920-528-0xxx, 920-528-2xxx, 920-528-3xxx, 920-528-6xxx, 920-528-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 920-528