Spb.ru zone on DNS google?

Question

Google

Today, starting from the morning until now, for some reason, the spb.ru zone is not displayed.
nslookup spb.ru 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53
** server can't find spb.ru: NXDOMAIN
Is there any information about where and what happened?

Answer 1

There are also problems with msk.ru.

Answer 2

Yes, since yesterday evening there has been a problem with responses from Google Public DNS (IP 8.8.8.8) regarding some domains in the spb.ru, msk.ru zones (and possibly others). For example :

%host gazeta.spb.ru 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:

Host gazeta.spb.ru not found: 2(SERVFAIL)

At the same time, NS nic.ru responds adequately
according to WHOIS.NIC.RU data:
domain: SPB.RU
type: GEOdomain
nserver: ns3-geo.nic.ru
nserver: ns4-geo.nic.ru
nserver: ns8-geo.nic. en

%host gazeta.spb.ru ns3-geo.nic.ru
Using domain server:
Name: ns3-geo.nic.ru
Address: 193.232.146.150#53
Aliases:

I went through Diagnosing resolution problems from Google
https://developers.google.com/speed/public-dns/doc...
and came across error messages I didn't understand (between ru and spb.ru) on
dnsviz.net/d/ gazeta.spb.ru/dnssec
Can anyone explain what this means? How to overcome this situation? Who is responsible?
Update:
Answer from RU-CENTER NCC
Hello!
According to updated information, the problem is currently located in the technical center of the entire spb.ru domain, whose head ns-servers work with varying degrees of success. According to the technical center of the spb.ru domain, experts are already working on this situation, a decision is expected within a few hours.