Prefix Information

The prefix 581 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-581-0000 through 712-581-9999).

Browse Numbers in This Prefix

712-581-0000-0999 712-581-1000-1999 712-581-2000-2999 712-581-3000-3999 712-581-4000-4999 712-581-5000-5999 712-581-6000-6999 712-581-7000-7999 712-581-8000-8999 712-581-9000-9999

Sample Numbers

(712) 581-0000 (712) 581-1234 (712) 581-2000 (712) 581-3333 (712) 581-4444 (712) 581-5555 (712) 581-6000 (712) 581-7777 (712) 581-8888 (712) 581-9999