.mil solicitações de DNS da zona não são resolvidas pela Rússia

Question

D:\>nslookup.exe

-> server 8.8.8.8
Сервер по умолчанию:  google-public-dns-a.google.com
Address:  8.8.8.8

-> ya.ru
Сервер:  google-public-dns-a.google.com
Address:  8.8.8.8

non-authoritative answer:
Имя:     ya.ru
Addresses:  2a02:6b8::3
          213.180.193.3
          213.180.204.3
          93.158.134.3

-> www.af.mil
Сервер:  google-public-dns-a.google.com
Address:  8.8.8.8

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Timed out request: google-public-dns-a.google.com
>

UPD. Resolvendo a zona .mil do host virtual Digtial Ocean

$ nslookup
> www.af.mil
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
www.af.mil      canonical name = www.af.mil.edgesuite.net.
www.af.mil.edgesuite.net        canonical name = a499.dscb.akamai.net.
Name:   a499.dscb.akamai.net
Address: 2.21.243.59
Name:   a499.dscb.akamai.net
Address: 2.21.243.75

agora permite alternar para o servidor DNS público russo

> server dns.yandex.ru
Default server: dns.yandex.ru
Address: 77.88.8.8#53
Default server: dns.yandex.ru
Address: 2a02:6b8::feed:ff#53
> www.af.mil
;; Got SERVFAIL reply from 77.88.8.8, trying next server
;; connection timed out; no servers could be reached 

OOPS !! o que aconteceu ???