Registro IPv4
host: chengdubbs.com
class: IN
ttl: 300
type: A
ip: 154.85.52.71

Servidores DNS Principal (mname) y Secundario (rname)
host: chengdubbs.com
class: IN
ttl: 21738
type: SOA
mname: ns1.bdydns.cn
rname: sa.dudns.com
serial: 2018080188
refresh: 3600
retry: 300
expire: 2592000
minimum-ttl: 120