I think most people who use 800notes know that the DNC Registry is pretty worthless for controlling calls like these. My phone has a 250-number blocking capacity and it's filling up fast.
Defenders of the DNC Registry--and there appear to be a few of them, likely government employees--say that telemarketing calls have fallen off sharply since the establishment of the registry. That's only true if you count large major legitimate businesses, who are the only ones who obey the law.
I receive more calls than ever, from solar energy salespeople, credit card "interest-lowerers", fake Microsoft technical people, lawn service companies, exterminators, sellers of fake extended warranties, phony IRS agents, mortgage brokers, air conditioning repair companies, and just about everyone else. Such calls are illegal but the FTC does nothing and never will do anything. Complaints just vanish without any action being taken by any government agency. It's pretty sickening, but that's government "efficiency" for us taxpayers.
Spam caller; I reported to complaints.doNotCall.gov.
It AUTOMATICALLY-DOES-NOT-RING: On my cell phone, I've installed "Call Blocker Free - Blacklist" by NQ Mobile Security for Android phones. It is useful for non-business phones to only accept calls from phone numbers I want, incoming unwanted calls automatically do not ring (rings on the spam caller end of the call, but not the recipient end and shows in the app instead of the phone call log). I go to the app>Main screen>Funnel icon>Blocking mode> change it to: "Accept ONLY FROM WHITELIST and CONTACTS". Add the phone numbers you wish to receive calls from to your Contacts (keep your Contacts up-to-date as normal) and/or add non-contacts that you wish to receive a call from to the app Whitelist. With my phone carrier service, I also turn voicemail OFF so that it doesn't pickup a spam call after its set time to record.
UPDATE: I'm liking "Call Blocker" by embware for Android phones better for the same and additional capabilities. It has the added ability to add a blocked non-spam number chosen from the blocked call log to the unblock-whitelist, with a name so I know the name associated with the phone number. And, it has the added ability to allow one-click-calling a whitelisted-allowed number. If you want to download it from google play, it has a 'B' on a padlock icon. I change the call setting from "block private number" (hidden callerID) to allow "phonebook only" (only allow incoming calls from Contacts and Whitelist). It only works for Android version 4 or less. The latest embware version changed to a 10-second delay to open (demo) but seemingly fully-working version.
Possibly (very likely) related to the same spam-calling operation that has been calling my number an average of 10 times per month since at least March 25, 2015, usually from a different phone number every time in numerous area codes.
It's best not to even call them back. Don't even press any numbers to be taken off of their list. They use robo calling to find out which numbers are actually active, If you even push a number to be "removed" from their list, they will sell your telephone number to other scammers. I just got the call. Answered. Blocked them. Filed a complaint with the "do not call registry complaint" and came here to warn others.