Prefix Information

The prefix 603 is part of area code 773 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (773-603-0000 through 773-603-9999).

Browse Numbers in This Prefix

773-603-0000-0999 773-603-1000-1999 773-603-2000-2999 773-603-3000-3999 773-603-4000-4999 773-603-5000-5999 773-603-6000-6999 773-603-7000-7999 773-603-8000-8999 773-603-9000-9999

Sample Numbers

(773) 603-0000 (773) 603-1234 (773) 603-2000 (773) 603-3333 (773) 603-4444 (773) 603-5555 (773) 603-6000 (773) 603-7777 (773) 603-8888 (773) 603-9999