Prefix Information

The prefix 640 is part of area code 331 serving Aurora, Illinois.

This exchange contains 10,000 possible phone numbers (331-640-0000 through 331-640-9999).

Browse Numbers in This Prefix

331-640-0000-0999 331-640-1000-1999 331-640-2000-2999 331-640-3000-3999 331-640-4000-4999 331-640-5000-5999 331-640-6000-6999 331-640-7000-7999 331-640-8000-8999 331-640-9000-9999

Sample Numbers

(331) 640-0000 (331) 640-1234 (331) 640-2000 (331) 640-3333 (331) 640-4444 (331) 640-5555 (331) 640-6000 (331) 640-7777 (331) 640-8888 (331) 640-9999