Prefix Information

The prefix 331 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-331-0000 through 779-331-9999).

Browse Numbers in This Prefix

779-331-0000-0999 779-331-1000-1999 779-331-2000-2999 779-331-3000-3999 779-331-4000-4999 779-331-5000-5999 779-331-6000-6999 779-331-7000-7999 779-331-8000-8999 779-331-9000-9999

Sample Numbers

(779) 331-0000 (779) 331-1234 (779) 331-2000 (779) 331-3333 (779) 331-4444 (779) 331-5555 (779) 331-6000 (779) 331-7777 (779) 331-8888 (779) 331-9999