← Area code 660
660-568 phone numbers
Numbers 660-568-0000 to 660-568-9999 are assigned to Centurylink in Houstonia, MO. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 660-568-2xxx, 660-568-6xxx, 660-568-7xxx, 660-568-8xxx, 660-568-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.