← Area code 712
712-231 phone numbers
Numbers 712-231-0000 to 712-231-9999 are assigned to New Cingular Wireless PCS, LLC in Hospers, IA. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 712-231-2xxx, 712-231-4xxx, 712-231-5xxx, 712-231-6xxx, 712-231-7xxx, 712-231-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.