>> Have registered on National Do Not Call List. Guess that means nothing <<
You are correct.
The DNC means nothing to scammers and spammers. After all, rules mean very little to criminals, right?
The DNC list is not a magic switch attached to your phone line, that will block calls.
The DNC list is intended to help stop calls originating from legitimate telemarketers.
* Your calls were not from legitimate telemarketers.
* Therefore, the DNC list will not stop those calls.
~~~~~~~~~~~~~~~~~~~~~~~
Still with us?
Want to learn more?
Keep reading ...
The DNC list does not automatically block calls. Instead, it provides a list of "do not call" phone numbers to legitimate, registered telemarketers who pay a fee for the list.
The DNC list exempts political callers, survey organizations, charities, and companies with preexisting business relationships, as well as debt collectors, but these organizations might have their own, internal Do Not Call list (ask them).
The DNC list is not effective against criminals, spammers and scammers, because those people do not subscribe to the DNC list, and do not care if you are on or off that list.
Its purpose is to stop calls from legitimate telemarketers, and it does a pretty good job at that. Just think ... if there were no DNC, you would be receiving incessant calls from BOTH legitimate and spamming telemarketers!
Here is your reading assignment:
http://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry
https://www.donotcall.gov/
http://www.ftc.gov/news-events/media-resource ... try/enforcement
http://www.ftc.gov/news-events/press-releases ... lemarketers-pay
http://www.ftc.gov/news-events/press-releases ... istry-data-book
Remember, the FCC's Do Not Call site is a good one to report unwanted calls from LEGITIMATE telemarketers. To report spammers and scammers, visit the FTC site, at https://www.ftccomplaintassistant.gov/
If you receive calls even after reporting them (and waiting a sufficient time), then you should consider using a call blocker app, device or service as your first line of defense. Google "call blocker" to see such things at Amazon or other sites.