NPA-NXX - 712-858

This is the 712-858 subcode (NPA-NXX) prefix page. Follow a prefix to find the number you are looking for. We divide our pages up to make them more user friendly to navigate!

1. Area Codes
2. 712
3. 712-858

The 712-858 subcode mainly covers Superior in Dickinson county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Iowa state. Many of the numbers in this subcode are Regular Landline registered to Superior Telephone Cooperative. We hear they employ a large number of people in the Iowa office.
Recently there have been an increase in reported calls, we've had over 16667 comments across our systems for the 712-858 subcode.