They say they are a location service. They say they are verifying an address for an item that needs to be mailed.
I called back the number cuz I didn't understand the name that the caller was giving me. Anyway, she gave me their website   http://www.everest-inc.com/
Told her I didn't know who they were calling about. She says she'll remove my number from the list.
We'll see if that happens. Only time will tell.