Prefix Information

The prefix 331 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-331-0000 through 815-331-9999).

Browse Numbers in This Prefix

815-331-0000-0999 815-331-1000-1999 815-331-2000-2999 815-331-3000-3999 815-331-4000-4999 815-331-5000-5999 815-331-6000-6999 815-331-7000-7999 815-331-8000-8999 815-331-9000-9999

Sample Numbers

(815) 331-0000 (815) 331-1234 (815) 331-2000 (815) 331-3333 (815) 331-4444 (815) 331-5555 (815) 331-6000 (815) 331-7777 (815) 331-8888 (815) 331-9999