Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: wwwcost.com
class: IN
ttl: 3600
type: A
ip: 74.208.236.87

Servidores DNS Principal (mname) y Secundario (rname)
host: wwwcost.com
class: IN
ttl: 86400
type: SOA
mname: ns1045.ui-dns.com
rname: hostmaster.1und1.com
serial: 2017060120
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: wwwcost.com
class: IN
ttl: 3600
type: MX
pri: 10
target: mx00.ionos.com

Servidor de Correo
host: wwwcost.com
class: IN
ttl: 3600
type: MX
pri: 10
target: mx01.ionos.com

Información TXT
host: wwwcost.com
class: IN
ttl: 3600
type: TXT
txt: 5487825ac6b298e98c0b407d63b1b96774be1ed6
entries: 

Información TXT
host: wwwcost.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf-us.ionos.com ~all
entries: 

Registro IPv6
host: wwwcost.com
class: IN
ttl: 3600
type: AAAA
ipv6: 2607:f1c0:100f:f000::200