Who called from 6178744502

No useful info on these guys.  Called, no msg left.   CNAM "Boston   MA".  They've been reported on
some of the other sites.  This was at noonish on Columbus day 2016.

Bob

Caller ID is just the number.  They leave no message.

I call back during business hours (using *67 to block my number).  The phone rang at least 20 times before I hung up.
Failing to have an outgoing message does not inspire confidence.

Another site claims they ask for you by name.  When you respond to your name they hang up.  Sounds like they are checking a list to see if your info is correct and if you respond.

A young man called asking for "Mrs Lindstrom" (not my name). I told him he had the wrong number and he hung up.

Received a call from this telephone number. No message was left. Anonymous callback reached RNA.

And they just called me again.