← Area code 320
320-566 phone numbers
Numbers 320-566-0000 to 320-566-9999 are assigned to Onvoy, LLC in Rush City, MN. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 320-566-5xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.