← Area code 507
507-688 phone numbers
Numbers 507-688-0000 to 507-688-9999 are assigned to Onvoy, LLC in Ellendale, MN. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 507-688-0xxx, 507-688-1xxx, 507-688-2xxx, 507-688-3xxx, 507-688-5xxx, 507-688-7xxx, 507-688-8xxx, 507-688-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.