[dns-operations] Google DNS + domain = not resolvable, other DNS + domain = resolvable

[Zack Piper]

Hi all,

Apologies if this ML is the wrong place to post this, I'm hoping someone
in here has seen this behavior
I've spotted something odd (to me at least) that a client has picked up on.

We're trying to resolve the domain mazuma.co.th, resolving the domain (A
records) on any of the following nameservers result in a SERVFAIL:

8.8.8.8: returned SERVFAIL or otherwise no records
8.8.4.4: returned SERVFAIL or otherwise no records
9.9.9.9: returned SERVFAIL or otherwise no records
194.150.168.168: returned SERVFAIL or otherwise no records
194.25.0.68: returned SERVFAIL or otherwise no records
194.25.0.52: returned SERVFAIL or otherwise no records
217.28.98.62: returned SERVFAIL or otherwise no records
194.25.0.60: returned SERVFAIL or otherwise no records
216.237.221.42: returned SERVFAIL or otherwise no records
64.135.1.20: returned SERVFAIL or otherwise no records
8.8.4.4: returned SERVFAIL or otherwise no records
200.221.11.100: returned SERVFAIL or otherwise no records
74.82.42.42: returned SERVFAIL or otherwise no records
216.66.80.30: returned SERVFAIL or otherwise no records
80.67.169.40: returned SERVFAIL or otherwise no records
212.112.39.22: returned SERVFAIL or otherwise no records
212.112.39.25: returned SERVFAIL or otherwise no records
62.20.15.234: returned SERVFAIL or otherwise no records
210.80.58.67: returned SERVFAIL or otherwise no records
212.94.34.34: returned SERVFAIL or otherwise no records

Of the 200 servers I tested, the above couldn't resolve mazuma.co.th

The rest can resolve it to 107.180.126.240

So I guess the SERVFAIL ones feed from Google? What I'm curious to know
is: does Google's public DNS blacklist malicious websites? The website
itself doesn't seem to be blocked on other things I checked.

Anyway, hopefully someone can shed some light on why Google's DNS can't
resolve mazuma.co.th but almost everything else can

Thanks,
-- 
Zack Piper             System administrator
           https://apertron.net