Called today, did not answer.  Caller ID said "Massachusecall".  No message.  I am on DNC list, but doesn't seem to matter.

No it doesn't matter.   The DNC doesn't apply to unknown callers,   non-message calls,  and hang-ups.
Go to the DNC site and read what does matter.

Just got him, scam to sell fake antivirus or security for Windows.

Took me 5 minutes to explain I have macs. If you have some time to loose definitively answer and have fun.

I got the same call about my computer.  I also use a Mac so no virus that the scam could 'fix'.  It was also very difficult to understand the caller.