NPA-NXX - 641-857

This is the 641-857 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. 641
3. 641-857

The 641-857 subcode mainly covers Dumont in Butler 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 Dumont 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 14867 comments across our systems for the 641-857 subcode.