Registro IPv4
host: crsp.com
class: IN
ttl: 89048
type: A
ip: 38.112.41.21

Servidores DNS Principal (mname) y Secundario (rname)
host: crsp.com
class: IN
ttl: 89049
type: SOA
mname: ucns3.uchicago.edu
rname: domainadmin.uchicago.edu
serial: 2
refresh: 7200
retry: 3600
expire: 2592000
minimum-ttl: 900