Registro IPv4
host: smartcity.cn
class: IN
ttl: 3421
type: A
ip: 208.91.197.26

Servidores DNS Principal (mname) y Secundario (rname)
host: smartcity.cn
class: IN
ttl: 3421
type: SOA
mname: NS67.WORLDNIC.COM
rname: namehost.WORLDNIC.COM
serial: 107120318
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600