Prefix Information

The prefix 121 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-121-0000 through 815-121-9999).

Browse Numbers in This Prefix

815-121-0000-0999 815-121-1000-1999 815-121-2000-2999 815-121-3000-3999 815-121-4000-4999 815-121-5000-5999 815-121-6000-6999 815-121-7000-7999 815-121-8000-8999 815-121-9000-9999

Sample Numbers

(815) 121-0000 (815) 121-1234 (815) 121-2000 (815) 121-3333 (815) 121-4444 (815) 121-5555 (815) 121-6000 (815) 121-7777 (815) 121-8888 (815) 121-9999