I've never heard of them changing or blocking entries. They're on Wikileaks' list of censorship-avoiding DNS servers http://www.wikileaks.org/wiki/Alternative_DNS And Google claims: Google Public DNS does not perform blocking or filtering of any kind. https://developers.google.com/speed/public-dns/docs/intro?cs...

Not what I had in mind. Ignoring the NXDOMAIN results, what makes you trust the VALUE of the NS/A/AAAA/MX/whatever records you get from Google (or any other resolver)?

Because I have frequently seen provably-wrong results from other resolvers, and some highly-suspicious results from 8.8.8.8 on occasion (though I haven't checked particularly often).

The point being, unless you're proving the results with DNSSEC (or similar), you can't trust any source.

Is that the sort of thing that could be fixed by running your own DNS resolver? I mean it all comes down to DNSSEC eventually.

You can limit some of the simple abuses by resolving DNS yourself, but DNSSEC (or other crypo-auth system) is best, of course.

I use and recommend doing both, as there's very little downside to running your own resolver.