← Area code 573
573-612 phone numbers
Numbers 573-612-0000 to 573-612-9999 are assigned to Centurylink in Rolla, MO. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-612-3xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.