several hang up calls over several days

Thrown off by the almost-familiar area code at a glance, I answered but nobody was there. I even waited until the call disconnected from their end. Typical phone spammers, get them now and then even though I'm on the do-not-call. These people are probably calling from a foreign country over the internet and passing a US number for caller ID so there's not much we can do.  Just add them to your block list on your phone.

Pretty much the same here, but I did not answer the call. The spammer called three times. I called back and I only got a recording saying that if I wanted to be placed on a do not call list.

Same thing, no answer and they called twice.

They just called me. I did not answer it .