Registro DMARC
v=spf1 -all

Registro IPv4
host: s4core.online
class: IN
ttl: 300
type: A
ip: 72.52.178.23

Servidores DNS Principal (mname) y Secundario (rname)
host: s4core.online
class: IN
ttl: 64411
type: SOA
mname: 01.dnsv.jp
rname: hostmaster.dnsv.jp
serial: 1750050345
refresh: 3600
retry: 900
expire: 604800
minimum-ttl: 300