Registro IPv4
host: calculustutor.biz
class: IN
ttl: 7200
type: A
ip: 208.91.197.127


Servidores DNS Principal (mname) y Secundario (rname)
host: calculustutor.biz
class: IN
ttl: 7200
type: SOA
mname: NS5.WORLDNIC.COM
rname: namehost.WORLDNIC.COM
serial: 108041522
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600
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