507-528 phone numbers

Numbers 507-528-0000 to 507-528-9999 are assigned to Citizens Telecom Co Mn-Frontier Citizens Com-Mn in Claremont, MN. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 507-528-0xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 507-528