Prefix Information

The prefix 399 is part of area code 779 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (779-399-0000 through 779-399-9999).

Browse Numbers in This Prefix

779-399-0000-0999 779-399-1000-1999 779-399-2000-2999 779-399-3000-3999 779-399-4000-4999 779-399-5000-5999 779-399-6000-6999 779-399-7000-7999 779-399-8000-8999 779-399-9000-9999

Sample Numbers

(779) 399-0000 (779) 399-1234 (779) 399-2000 (779) 399-3333 (779) 399-4444 (779) 399-5555 (779) 399-6000 (779) 399-7777 (779) 399-8888 (779) 399-9999