NPA-NXX - 920-640

This is the 920-640 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. 920
3. 920-640

The 920-640 subcode mainly covers Jefferson in Jefferson county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Wisconsin state. Many of the numbers in this subcode are Paging (Dedicated) registered to American Messaging. We hear they employ a large number of people in the Wisconsin office.
Recently there have been an increase in reported calls, we've had over 83686 comments across our systems for the 920-640 subcode.