Prefix Information

The prefix 231 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-231-0000 through 779-231-9999).

Browse Numbers in This Prefix

779-231-0000-0999 779-231-1000-1999 779-231-2000-2999 779-231-3000-3999 779-231-4000-4999 779-231-5000-5999 779-231-6000-6999 779-231-7000-7999 779-231-8000-8999 779-231-9000-9999

Sample Numbers

(779) 231-0000 (779) 231-1234 (779) 231-2000 (779) 231-3333 (779) 231-4444 (779) 231-5555 (779) 231-6000 (779) 231-7777 (779) 231-8888 (779) 231-9999