Prefix Information

The prefix 631 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-631-0000 through 712-631-9999).

Browse Numbers in This Prefix

712-631-0000-0999 712-631-1000-1999 712-631-2000-2999 712-631-3000-3999 712-631-4000-4999 712-631-5000-5999 712-631-6000-6999 712-631-7000-7999 712-631-8000-8999 712-631-9000-9999

Sample Numbers

(712) 631-0000 (712) 631-1234 (712) 631-2000 (712) 631-3333 (712) 631-4444 (712) 631-5555 (712) 631-6000 (712) 631-7777 (712) 631-8888 (712) 631-9999