Prefix Information

The prefix 431 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-431-0000 through 815-431-9999).

Browse Numbers in This Prefix

815-431-0000-0999 815-431-1000-1999 815-431-2000-2999 815-431-3000-3999 815-431-4000-4999 815-431-5000-5999 815-431-6000-6999 815-431-7000-7999 815-431-8000-8999 815-431-9000-9999

Sample Numbers

(815) 431-0000 (815) 431-1234 (815) 431-2000 (815) 431-3333 (815) 431-4444 (815) 431-5555 (815) 431-6000 (815) 431-7777 (815) 431-8888 (815) 431-9999