there is no distributed dns just multiple point of failures for root servers
and someone just stolen one of the named root servers
on my old dns config I had these values
. 3600000 NS L.ROOT-SERVERS.NET.
L.ROOT-SERVERS.NET. 3600000 A 220.127.116.11
so i have to replace it with 18.104.22.168
download root dns server list "named.root" from FTP.RS.INTERNIC.NET (anonymous ftp) with filezilla