Registro IPv4
host: ypm.vn
class: IN
ttl: 300
type: A
ip: 76.76.21.21

Servidores DNS Principal (mname) y Secundario (rname)
host: ypm.vn
class: IN
ttl: 3600
type: SOA
mname: ns1.matbao.com
rname: admin.matbao.com
serial: 2024121033
refresh: 7200
retry: 300
expire: 604800
minimum-ttl: 3600