Prefix Information

The prefix 121 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-121-0000 through 779-121-9999).

Browse Numbers in This Prefix

779-121-0000-0999 779-121-1000-1999 779-121-2000-2999 779-121-3000-3999 779-121-4000-4999 779-121-5000-5999 779-121-6000-6999 779-121-7000-7999 779-121-8000-8999 779-121-9000-9999

Sample Numbers

(779) 121-0000 (779) 121-1234 (779) 121-2000 (779) 121-3333 (779) 121-4444 (779) 121-5555 (779) 121-6000 (779) 121-7777 (779) 121-8888 (779) 121-9999