Prefix Information

The prefix 603 is part of area code 331 serving Aurora, Illinois.

This exchange contains 10,000 possible phone numbers (331-603-0000 through 331-603-9999).

Browse Numbers in This Prefix

331-603-0000-0999 331-603-1000-1999 331-603-2000-2999 331-603-3000-3999 331-603-4000-4999 331-603-5000-5999 331-603-6000-6999 331-603-7000-7999 331-603-8000-8999 331-603-9000-9999

Sample Numbers

(331) 603-0000 (331) 603-1234 (331) 603-2000 (331) 603-3333 (331) 603-4444 (331) 603-5555 (331) 603-6000 (331) 603-7777 (331) 603-8888 (331) 603-9999