Prefix Information

The prefix 644 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-644-0000 through 712-644-9999).

Browse Numbers in This Prefix

712-644-0000-0999 712-644-1000-1999 712-644-2000-2999 712-644-3000-3999 712-644-4000-4999 712-644-5000-5999 712-644-6000-6999 712-644-7000-7999 712-644-8000-8999 712-644-9000-9999

Sample Numbers

(712) 644-0000 (712) 644-1234 (712) 644-2000 (712) 644-3333 (712) 644-4444 (712) 644-5555 (712) 644-6000 (712) 644-7777 (712) 644-8888 (712) 644-9999