Received a call from 1-321-270-3507.  I inadvertantly answered and they said something about I had used or visited one of their services or something.  I hung up immediately and blocked the number.

No one should be calling my cell unless I give them that number.

Received call from this number which I didn't answer and a message was not left.   Fairly certain that this is not a legitimate business because:
(A) A legitimate business would likely have a website or number listing someplace containing this number which google would pick up and that isn't the case.
(B) This call was to my unlisted tracfone number which I never provide to any business anyway; so the call was likely due to somebody calling unknown numbers hoping to get a "bite".
(C) Wasn't courteous enough to leave a message.