← Area code 573
573-660 phone numbers
Numbers 573-660-0000 to 573-660-9999 are assigned to New Cingular Wireless PCS, LLC in Doniphan, MO. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-660-4xxx, 573-660-5xxx, 573-660-6xxx, 573-660-7xxx, 573-660-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.