Prefix Information

The prefix 640 is part of area code 311 serving Unknown, Unknown.

This exchange contains 10,000 possible phone numbers (311-640-0000 through 311-640-9999).

Browse Numbers in This Prefix

311-640-0000-0999 311-640-1000-1999 311-640-2000-2999 311-640-3000-3999 311-640-4000-4999 311-640-5000-5999 311-640-6000-6999 311-640-7000-7999 311-640-8000-8999 311-640-9000-9999

Sample Numbers

(311) 640-0000 (311) 640-1234 (311) 640-2000 (311) 640-3333 (311) 640-4444 (311) 640-5555 (311) 640-6000 (311) 640-7777 (311) 640-8888 (311) 640-9999