Who called from 3476716367

Have no idea who this is.  Got 2 calls from this # on my cell three minutes apart. Tried to call it back & all I got was a BZ signal.

They just called me too.what do they want?

Called and hung up on the  answering machine.
Caller ID says Merrill Lynch  or  Lynch, Merrill.
According to another website the caller had a thick accent and said something about blood-thinners, but I don't know.

I have gotten these calls on my work phone at least three times, the question is always if I, or anyone in my family takes blood thinners, when I say no they say “oh” and hang up.

answered, which I usually don't, they hung up wihout leaving a message.