Registro DMARC
v=DMARC1; p=reject; sp=none; pct=30; aspf=r; fo=1; adkim=r; rua=mailto:info@expresschallenges.com; ruf=mailto:info@expresschallenges.com

Registro IPv4
host: expresschallenges.com
class: IN
ttl: 300
type: A
ip: 172.67.170.40

Registro IPv4
host: expresschallenges.com
class: IN
ttl: 300
type: A
ip: 104.21.28.15

Servidores DNS Principal (mname) y Secundario (rname)
host: expresschallenges.com
class: IN
ttl: 1800
type: SOA
mname: amber.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2350614559
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: expresschallenges.com
class: IN
ttl: 300
type: MX
pri: 1
target: mail.expresschallenges.com

Información TXT
host: expresschallenges.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 a mx ip4:51.254.111.162 ~all
entries: Array

Registro IPv6
host: expresschallenges.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3033::ac43:aa28

Registro IPv6
host: expresschallenges.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3030::6815:1c0f