NPA-NXX - 712-204

This is the 712-204 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. 712-204

The 712-204 subcode mainly covers Sioux City in Woodbury 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 Miscellaneous registered to Swiftel Communications. 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 102172 comments across our systems for the 712-204 subcode.