Prefix Information

The prefix 640 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-640-0000 through 712-640-9999).

Browse Numbers in This Prefix

712-640-0000-0999 712-640-1000-1999 712-640-2000-2999 712-640-3000-3999 712-640-4000-4999 712-640-5000-5999 712-640-6000-6999 712-640-7000-7999 712-640-8000-8999 712-640-9000-9999

Sample Numbers

(712) 640-0000 (712) 640-1234 (712) 640-2000 (712) 640-3333 (712) 640-4444 (712) 640-5555 (712) 640-6000 (712) 640-7777 (712) 640-8888 (712) 640-9999