Couldn't understand her but wants to offer homeowners some kind of free inspection

Getting calls from this number. Caller ID shows "Name Not Found." No one responds when answering the phone, just a click as the call is disconnected. Calling the number back results in a recording.."The number or area code is incorrect..." I tried other numbers with 386-772 beginning and the same thing happens every time... "The number or code you have dialed in incorrect..." Checking the internet, the 772 exchange in area code 386 is assigned for mobile service but it has no assigned carrier. Odd.