Prefix Information

The prefix 421 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-421-0000 through 712-421-9999).

Browse Numbers in This Prefix

712-421-0000-0999 712-421-1000-1999 712-421-2000-2999 712-421-3000-3999 712-421-4000-4999 712-421-5000-5999 712-421-6000-6999 712-421-7000-7999 712-421-8000-8999 712-421-9000-9999

Sample Numbers

(712) 421-0000 (712) 421-1234 (712) 421-2000 (712) 421-3333 (712) 421-4444 (712) 421-5555 (712) 421-6000 (712) 421-7777 (712) 421-8888 (712) 421-9999