What happens with DNS Habr or DNS choice

Question

Domain Name System

At the moment I am looking for optimal NS servers for several projects.
The first thing that came to mind was to analyze sites with a high load.
One of them was Habr.

And it just so happened that I spotted an interesting situation:

[16:15]#20009 [email protected]:~
> host -a habrahabr.ru 
Trying "habrahabr.ru"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26608
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 8

;; QUESTION SECTION:
;habrahabr.ru.                  IN      ANY

;; ANSWER SECTION:
habrahabr.ru.           554     IN      A       212.24.43.42

;; AUTHORITY SECTION:
ru.                     13116   IN      NS      f.dns.ripn.net.
ru.                     13116   IN      NS      b.dns.ripn.net.
ru.                     13116   IN      NS      e.dns.ripn.net.
ru.                     13116   IN      NS      a.dns.ripn.net.
ru.                     13116   IN      NS      d.dns.ripn.net.

;; ADDITIONAL SECTION:
a.dns.ripn.net.         65267   IN      A       193.232.128.6
a.dns.ripn.net.         21254   IN      AAAA    2001:678:17:0:193:232:128:6
b.dns.ripn.net.         17527   IN      A       194.85.252.62
d.dns.ripn.net.         11034   IN      A       194.190.124.17
d.dns.ripn.net.         48200   IN      AAAA    2001:678:18:0:194:190:124:17
e.dns.ripn.net.         60222   IN      A       193.232.142.17
f.dns.ripn.net.         15962   IN      A       193.232.156.17
f.dns.ripn.net.         15959   IN      AAAA    2001:678:14:0:193:232:156:17

Received 302 bytes from 192.168.32.1#53 in 3 ms

And a little later:

[16:39]#20013 [email protected]:~
> host -a habrahabr.ru
Trying "habrahabr.ru"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51925
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;habrahabr.ru.                  IN      ANY

;; ANSWER SECTION:
habrahabr.ru.           311     IN      NS      ns1.habradns.net.
habrahabr.ru.           311     IN      NS      ns2.habradns.net.
habrahabr.ru.           311     IN      A       212.24.43.42

;; AUTHORITY SECTION:
habrahabr.ru.           311     IN      NS      ns2.habradns.net.
habrahabr.ru.           311     IN      NS      ns1.habradns.net.

Received 122 bytes from 192.168.32.1#53 in 5 ms

Before that, I was looking at paid cloudns.net, but after this interesting event, I saw that IX provides DNS servers.

Questions:
1. What is happening with Habr and why is it needed?
2. What can you say about cloudns.net (the projects are hosted in Russia and the target audience is Russia)?
3. Does IX have an advantage (over the same cloudns.net)?
3. Do you need something like lbnamed (when one of the front-ends is unavailable, DNS stops giving its address until the server rises, but this, as I understand it, is difficult to implement with other people's slave servers)?

Answer 1

I only have an answer to the first question.
It looks like the DNS service is on the ns1.habradns.net server.
This can be easily verified by doing

dig @ns1.habradns.net habrahabr.ru

in the console, or by following this link .
The ns1.habradns.net server itself is pinged.
PS. I already wrote to Habr's technical support.

Answer 2

3. Many servers in Russia and Europe. List.
4. MSK-IX does not have such functionality and is unlikely to have it.

Answer 3

del

Answer 4

By the way, I most likely understood the situation with *.dns.ripn.net.
My host gave the same records when I redirected domains to new ns-servers, but the zone for them was not raised there.

Answer 5

try fmonsy.com