Registro IPv4
host: upcrv.com
class: IN
ttl: 23728
type: A
ip: 208.91.197.218

Servidores DNS Principal (mname) y Secundario (rname)
host: upcrv.com
class: IN
ttl: 7200
type: SOA
mname: ns4.active-dns.com
rname: timothyalex.gmail.com
serial: 2017031001
refresh: 7200
retry: 7200
expire: 172800
minimum-ttl: 38400