Prefix Information

The prefix 340 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-340-0000 through 712-340-9999).

Browse Numbers in This Prefix

712-340-0000-0999 712-340-1000-1999 712-340-2000-2999 712-340-3000-3999 712-340-4000-4999 712-340-5000-5999 712-340-6000-6999 712-340-7000-7999 712-340-8000-8999 712-340-9000-9999

Sample Numbers

(712) 340-0000 (712) 340-1234 (712) 340-2000 (712) 340-3333 (712) 340-4444 (712) 340-5555 (712) 340-6000 (712) 340-7777 (712) 340-8888 (712) 340-9999