Registro IPv4
host: phaco.clinic
class: IN
ttl: 3600
type: A
ip: 66.81.203.137

Servidores DNS Principal (mname) y Secundario (rname)
host: phaco.clinic
class: IN
ttl: 7200
type: SOA
mname: NS19.WORLDNIC.COM
rname: namehost.WORLDNIC.COM
serial: 115090107
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600