Received call from this number to Rapid City area landline.     Caller ID name read "SIOUX FALLS   SD".
I disconnected the call without answering, so I don't know what it was about.  Calling the number (after blocking my outgoing caller ID info) results in the "No one is available to take your call" recorded message -- not sure if that means it is actually an assigned number or not.    I don't think the number belongs to ADT Home Security as an internet search would suggest.   Probably a scam, or maybe political.