Prefix Information

The prefix 399 is part of area code 773 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (773-399-0000 through 773-399-9999).

Browse Numbers in This Prefix

773-399-0000-0999 773-399-1000-1999 773-399-2000-2999 773-399-3000-3999 773-399-4000-4999 773-399-5000-5999 773-399-6000-6999 773-399-7000-7999 773-399-8000-8999 773-399-9000-9999

Sample Numbers

(773) 399-0000 (773) 399-1234 (773) 399-2000 (773) 399-3333 (773) 399-4444 (773) 399-5555 (773) 399-6000 (773) 399-7777 (773) 399-8888 (773) 399-9999