Registro IPv4
host: uscdo.com
class: IN
ttl: 600
type: A
ip: 216.152.230.120

Servidores DNS Principal (mname) y Secundario (rname)
host: uscdo.com
class: IN
ttl: 3600
type: SOA
mname: ns1.domainnamedns.com
rname: support.namens.net
serial: 1767352143
refresh: 10800
retry: 1800
expire: 3600000
minimum-ttl: 1800