I've downloaded Mr. Number...free...works great! You can block all these calls....when it rings it's usually one ring and presto...that number is blocked! I love Mr Number....and yes, 571-758-2578 is now history too ;)
Do your research FIRST before downloading any free app for a cell phone. Some (some) contain spyware, as featured on CBS/ABC news broadcasts. Check FIRST.
Received a call from this number on my cell yesterday (6/30/15). Didn't answer it, so I can only go by what people have said here about who it is. I agree with the gentleman about not giving to political parties or candidates. I am not fond of the "Usurper-in-chief" in the WH but then I'm not fond of the Repub's who don't seem to have the gumption to hold him accountable for his lawlessness.