Registro IPv4
host: is3.cn
class: IN
ttl: 600
type: A
ip: 120.55.245.54

Servidores DNS Principal (mname) y Secundario (rname)
host: is3.cn
class: IN
ttl: 600
type: SOA
mname: dns1.hichina.com
rname: hostmaster.hichina.com
serial: 2026010913
refresh: 3600
retry: 1200
expire: 86400
minimum-ttl: 600