← Area code 712
712-407 phone numbers
Numbers 712-407-0000 to 712-407-9999 are assigned to Walnut Telephone Company, Inc. in Minden, IA. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 712-407-0xxx, 712-407-3xxx, 712-407-5xxx, 712-407-6xxx, 712-407-8xxx, 712-407-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.