Prefix Information

The prefix 638 is part of area code 712 serving Sioux City, Iowa.

This exchange contains 10,000 possible phone numbers (712-638-0000 through 712-638-9999).

Browse Numbers in This Prefix

712-638-0000-0999 712-638-1000-1999 712-638-2000-2999 712-638-3000-3999 712-638-4000-4999 712-638-5000-5999 712-638-6000-6999 712-638-7000-7999 712-638-8000-8999 712-638-9000-9999

Sample Numbers

(712) 638-0000 (712) 638-1234 (712) 638-2000 (712) 638-3333 (712) 638-4444 (712) 638-5555 (712) 638-6000 (712) 638-7777 (712) 638-8888 (712) 638-9999