Registro IPv4
host: custcenter.com
class: IN
ttl: 21600
type: A
ip: 50.56.38.227

Servidores DNS Principal (mname) y Secundario (rname)
host: custcenter.com
class: IN
ttl: 300
type: SOA
mname: ns.rackspace.com
rname: hostmaster.rackspace.com
serial: 1590214013
refresh: 3600
retry: 300
expire: 1814400
minimum-ttl: 300