Registro IPv4
host: med.nu.ac.th
class: IN
ttl: 21600
type: A
ip: 110.170.248.22

Servidores DNS Principal (mname) y Secundario (rname)
host: med.nu.ac.th
class: IN
ttl: 3600
type: SOA
mname: ns1-01.azure-dns.com
rname: azuredns-hostmaster.microsoft.com
serial: 1
refresh: 3600
retry: 300
expire: 2419200
minimum-ttl: 300