← Area code 573
573-593 phone numbers
Numbers 573-593-0000 to 573-593-9999 are assigned to Windstream Missouri, Inc. in Grandin, MO. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-593-2xxx, 573-593-3xxx, 573-593-6xxx, 573-593-7xxx, 573-593-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.