Prefix Information

The prefix 100 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-100-0000 through 815-100-9999).

Browse Numbers in This Prefix

815-100-0000-0999 815-100-1000-1999 815-100-2000-2999 815-100-3000-3999 815-100-4000-4999 815-100-5000-5999 815-100-6000-6999 815-100-7000-7999 815-100-8000-8999 815-100-9000-9999

Sample Numbers

(815) 100-0000 (815) 100-1234 (815) 100-2000 (815) 100-3333 (815) 100-4444 (815) 100-5555 (815) 100-6000 (815) 100-7777 (815) 100-8888 (815) 100-9999