Registro IPv4
host: sygk100.cn
class: IN
ttl: 600
type: A
ip: 121.4.63.37

Servidores DNS Principal (mname) y Secundario (rname)
host: sygk100.cn
class: IN
ttl: 180
type: SOA
mname: temporary.dnspod.net
rname: freednsadmin.dnspod.com
serial: 1648609841
refresh: 3600
retry: 180
expire: 1209600
minimum-ttl: 180