Prefix Information

The prefix 231 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-231-0000 through 712-231-9999).

Browse Numbers in This Prefix

712-231-0000-0999 712-231-1000-1999 712-231-2000-2999 712-231-3000-3999 712-231-4000-4999 712-231-5000-5999 712-231-6000-6999 712-231-7000-7999 712-231-8000-8999 712-231-9000-9999

Sample Numbers

(712) 231-0000 (712) 231-1234 (712) 231-2000 (712) 231-3333 (712) 231-4444 (712) 231-5555 (712) 231-6000 (712) 231-7777 (712) 231-8888 (712) 231-9999