Registro IPv4
host: nicdns.cn
class: IN
ttl: 1021
type: A
ip: 58.221.29.73

Servidores DNS Principal (mname) y Secundario (rname)
host: nicdns.cn
class: IN
ttl: 180
type: SOA
mname: f1g1ns1.dnspod.net
rname: freednsadmin.dnspod.com
serial: 1784253750
refresh: 3600
retry: 180
expire: 1209600
minimum-ttl: 180