Registro IPv4
host: whatis.ru
class: IN
ttl: 7200
type: A
ip: 37.139.21.126

Servidores DNS Principal (mname) y Secundario (rname)
host: whatis.ru
class: IN
ttl: 7200
type: SOA
mname: ns1.nameself.com
rname: support.regtime.net
serial: 1668931564
refresh: 300
retry: 300
expire: 604800
minimum-ttl: 7200