Prefix Information

The prefix 821 is part of area code 773 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (773-821-0000 through 773-821-9999).

Browse Numbers in This Prefix

773-821-0000-0999 773-821-1000-1999 773-821-2000-2999 773-821-3000-3999 773-821-4000-4999 773-821-5000-5999 773-821-6000-6999 773-821-7000-7999 773-821-8000-8999 773-821-9000-9999

Sample Numbers

(773) 821-0000 (773) 821-1234 (773) 821-2000 (773) 821-3333 (773) 821-4444 (773) 821-5555 (773) 821-6000 (773) 821-7777 (773) 821-8888 (773) 821-9999