They are a collection - attorneys office out of Wyoming. They are collecting on bad debts. Ans have been nice to remove numbers when they no longer belong to who they are looking for. If you call the 800 number they leave during there normal hours you can talk to a live person.
All well and good, if the were honest, forthright, and above all, NOT wrong about who they are pursuing, or whether the person actually owes a debt. They seem to be wrong a lot, and it doesn't stop them from harassing the wrong person.