Prefix Information

The prefix 503 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-503-0000 through 779-503-9999).

Browse Numbers in This Prefix

779-503-0000-0999 779-503-1000-1999 779-503-2000-2999 779-503-3000-3999 779-503-4000-4999 779-503-5000-5999 779-503-6000-6999 779-503-7000-7999 779-503-8000-8999 779-503-9000-9999

Sample Numbers

(779) 503-0000 (779) 503-1234 (779) 503-2000 (779) 503-3333 (779) 503-4444 (779) 503-5555 (779) 503-6000 (779) 503-7777 (779) 503-8888 (779) 503-9999