Prefix Information

The prefix 640 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-640-0000 through 779-640-9999).

Browse Numbers in This Prefix

779-640-0000-0999 779-640-1000-1999 779-640-2000-2999 779-640-3000-3999 779-640-4000-4999 779-640-5000-5999 779-640-6000-6999 779-640-7000-7999 779-640-8000-8999 779-640-9000-9999

Sample Numbers

(779) 640-0000 (779) 640-1234 (779) 640-2000 (779) 640-3333 (779) 640-4444 (779) 640-5555 (779) 640-6000 (779) 640-7777 (779) 640-8888 (779) 640-9999