Registro IPv4
host: comcastbusiness.net
class: IN
ttl: 7200
type: A
ip: 165.160.15.20

Registro IPv4
host: comcastbusiness.net
class: IN
ttl: 7200
type: A
ip: 165.160.13.20

Servidores DNS Principal (mname) y Secundario (rname)
host: comcastbusiness.net
class: IN
ttl: 3600
type: SOA
mname: ns.comcastbusiness.net
rname: domregtech.comcastonline.com
serial: 2008113739
refresh: 7200
retry: 300
expire: 604800
minimum-ttl: 900