Registro DMARC
v=DMARC1; p=reject; ruf=mailto:postmaster@certlibrary.com; fo=1

Registro IPv4
host: certlibrary.com
class: IN
ttl: 300
type: A
ip: 104.21.8.163

Registro IPv4
host: certlibrary.com
class: IN
ttl: 300
type: A
ip: 172.67.130.142

Servidores DNS Principal (mname) y Secundario (rname)
host: certlibrary.com
class: IN
ttl: 1800
type: SOA
mname: fatima.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2416385860
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: certlibrary.com
class: IN
ttl: 300
type: MX
pri: 10
target: monday.mxrouting.net

Servidor de Correo
host: certlibrary.com
class: IN
ttl: 300
type: MX
pri: 20
target: monday-relay.mxrouting.net

Información TXT
host: certlibrary.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 ip4:31.170.123.134 a:smtp.webfaction.com a:mail.holtzergroup.com a:mail.certlibrary.com include:mxlogin.com ~all
entries: 

Registro IPv6
host: certlibrary.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3037::6815:8a3

Registro IPv6
host: certlibrary.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3037::ac43:828e