Registro IPv4
host: global-nebulaag.webex.com
class: IN
ttl: 90
type: A
ip: 170.72.18.7

host: eduxunta.webex.com
class: IN
ttl: 599
type: CNAME
target: nebulaag.webex.com

Servidores DNS Principal (mname) y Secundario (rname)
host: global-nebulaag.webex.com
class: IN
ttl: 3600
type: SOA
mname: fra01-wxpd-lb01-adns.webex.com
rname: iaas-lb.cisco.com
serial: 100
refresh: 3600
retry: 3
expire: 3600
minimum-ttl: 5