← Area code 573
573-628 phone numbers
Numbers 573-628-0000 to 573-628-9999 are assigned to Southwestern Bell in Wardell, MO. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-628-4xxx, 573-628-5xxx, 573-628-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.