When i called back (by blocking my phone number) they said they were "Everest Receivables", a "verification & location verification company". When they answered the phone (and I called back several times) they do not identify the name of the company first, I had to ask who they were and what they did. They record all calls coming in. I asked her why she would be calling someone, and she said "to verify your address". Not sure why someone would need that information but not be willing to identify themselves. Seems sketchy to me. Be careful.