Registro IPv4
host: engineering.org
class: IN
ttl: 21600
type: A
ip: 99.83.176.46

Servidores DNS Principal (mname) y Secundario (rname)
host: engineering.org
class: IN
ttl: 21600
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2026102101
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800