NPA-NXX - 307-356

This is the 307-356 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. 307
3. 307-356

The 307-356 subcode mainly covers Shirley Basin in Carbon county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Wyoming state. Many of the numbers in this subcode are Regular Landline registered to Union Telephone Company. We hear they employ a large number of people in the Wyoming office.
Recently there have been an increase in reported calls, we've had over 15885 comments across our systems for the 307-356 subcode.