Registro IPv4
host: el.edu.vn
class: IN
ttl: 3600
type: A
ip: 202.92.5.48

Servidores DNS Principal (mname) y Secundario (rname)
host: el.edu.vn
class: IN
ttl: 360
type: SOA
mname: ns-master.inet.vn
rname: postmaster.inet.vn
serial: 2015072800
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 360