NPA-NXX - 641-428

This is the 641-428 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. 641-428

The 641-428 subcode mainly covers Mason City in Cerro Gordo 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 Centurylink. 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 44151 comments across our systems for the 641-428 subcode.