Keeps calling, scam/

Received a call from a man with a Indian accent who kept asking if I was -- he gave a name.  Asked him who he was and where he was calling from and he said his name was Martin and he was calling about BMW car insurance.   Hung up. Sounds like a scam.

Call appears as unknown in caller ID.  They never leave a message either.  

Hindu Indian with an accent so hard to understand, I had to ask him to repeat himself twice.  Calling from the offices of William Long of Skyward (?) and he has Mr. Long holding on the line to be connected to Mr. (my boss).  I told him, "well, that will never happen but you have a nice day and thank you for calling".  Click.  

LOSERS.

Got a call this morning when I was on another line. No message. But I've gotten in the past week multiple calls from different numbers where they got my first name right and then gave the wrong last name. I've started asking "Who is calling and what is this in regards to?" and get a vague reply. Numbers I've gotten these strange calls from in the last week include:
312-614-1338
804-596-1074
469-757-8869
719-219-7193
276-692-2049
415-366-0709