← Area code 660
660-770 phone numbers
Numbers 660-770-0000 to 660-770-9999 are assigned to Commio, LLC in Fayette, MO. 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 660-770-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.