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 126.96.36.199
so i have to replace it with 188.8.131.52
download root dns server list "named.root" from FTP.RS.INTERNIC.NET (anonymous ftp) with filezilla