The DNC list does not automatically block calls.  Instead, it provides a list of  "do not call" phone numbers to legitimate telemarketers who pay a fee for the list.

The DNC list exempts political callers, survey organizations,  charities and companies with preexisting business relationships, 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.

Here is your reading assignment:
https://www.donotcall.gov/
http://www.ftc.gov/news-events/media-resource ... try/enforcement

Remember, the Do Not Call site is a good one to report unwanted calls from LEGITIMATE telemarketers.  The DNC list does not cover calls from criminal scammers & spammers.  To report those, visit 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.
http://gg.gg/blockers

I'm on "do not call list" yet my phone rings constantly from thrse people.

Boo telemarketer. Leave me alone.

REALLY REALLY REEEEAAAALLLLYYYYY tired on the Telemarketers.....Call ..let it go to voicemail...NO MESSAGE..just the usual hangup!! Ugghhhh!!! Wish I could just catch them once and tell them to get a f'n life!! :-(

Telemarketing.
Keep it up caller - my number is on the do not call list and has been since 2005. I'm already in the process of suing another twit company for their violations.
$1000.  per call....
My ship's finally about to come in!!!

First time today at 10:52 am.......I did not answer and no message left.   Area code is from Texas

Really, really tired of these tetemarketers.

They will call using different numbers too. I ignore them and let them go to voicemail.

why do they call all hours of the day?

Call was a recorded message about getting a second income.  Came in on my cell phone :(

I hung up after a few seconds.

scam numbers to sell junk bonds

Called didn't leave vm

Stupid call. I just ignored it.

Same ol, Same ol!  Stupid telemarketers.  Called and did not leave a message.