Prefix Information
The prefix 128 is part of area code 712 serving Sioux City, Iowa.
This exchange contains 10,000 possible phone numbers (712-128-0000 through 712-128-9999).
Phone numbers with prefix 128 in area code 712. Location: Sioux City, Iowa.
The prefix 128 is part of area code 712 serving Sioux City, Iowa.
This exchange contains 10,000 possible phone numbers (712-128-0000 through 712-128-9999).