Prefix Information

The prefix 423 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-423-0000 through 779-423-9999).

Browse Numbers in This Prefix

779-423-0000-0999 779-423-1000-1999 779-423-2000-2999 779-423-3000-3999 779-423-4000-4999 779-423-5000-5999 779-423-6000-6999 779-423-7000-7999 779-423-8000-8999 779-423-9000-9999

Sample Numbers

(779) 423-0000 (779) 423-1234 (779) 423-2000 (779) 423-3333 (779) 423-4444 (779) 423-5555 (779) 423-6000 (779) 423-7777 (779) 423-8888 (779) 423-9999