← Area code 507
507-666 phone numbers
Numbers 507-666-0000 to 507-666-9999 are assigned to Onvoy, LLC (rate centre WORTHINGTN, MN, NANPA abbreviation). 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 507-666-2xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.