Prefix Information

The prefix 421 is part of area code 773 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (773-421-0000 through 773-421-9999).

Browse Numbers in This Prefix

773-421-0000-0999 773-421-1000-1999 773-421-2000-2999 773-421-3000-3999 773-421-4000-4999 773-421-5000-5999 773-421-6000-6999 773-421-7000-7999 773-421-8000-8999 773-421-9000-9999

Sample Numbers

(773) 421-0000 (773) 421-1234 (773) 421-2000 (773) 421-3333 (773) 421-4444 (773) 421-5555 (773) 421-6000 (773) 421-7777 (773) 421-8888 (773) 421-9999