Prefix Information

The prefix 203 is part of area code 331 serving Aurora, Illinois.

This exchange contains 10,000 possible phone numbers (331-203-0000 through 331-203-9999).

Browse Numbers in This Prefix

331-203-0000-0999 331-203-1000-1999 331-203-2000-2999 331-203-3000-3999 331-203-4000-4999 331-203-5000-5999 331-203-6000-6999 331-203-7000-7999 331-203-8000-8999 331-203-9000-9999

Sample Numbers

(331) 203-0000 (331) 203-1234 (331) 203-2000 (331) 203-3333 (331) 203-4444 (331) 203-5555 (331) 203-6000 (331) 203-7777 (331) 203-8888 (331) 203-9999