NPA-NXX - 712-778

This is the 712-778 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. 712-778

The 712-778 subcode mainly covers Griswold in Cass 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 Griswold Cooperative Telephone Company. 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 13956 comments across our systems for the 712-778 subcode.