Registro DMARC
v=DMARC1; p=reject

Registro IPv4
host: codeforces.com
class: IN
ttl: 300
type: A
ip: 104.26.6.164

Registro IPv4
host: codeforces.com
class: IN
ttl: 300
type: A
ip: 172.67.68.254

Registro IPv4
host: codeforces.com
class: IN
ttl: 300
type: A
ip: 104.26.7.164

Servidores DNS Principal (mname) y Secundario (rname)
host: codeforces.com
class: IN
ttl: 1800
type: SOA
mname: fred.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2401316062
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: codeforces.com
class: IN
ttl: 300
type: MX
pri: 10
target: mx.yandex.net

Información TXT
host: codeforces.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 ip4:77.234.204.67 ip4:95.163.252.67 include:_spf.yandex.net -all
entries: Array

Información TXT
host: codeforces.com
class: IN
ttl: 300
type: TXT
txt: loaderio=17e74635884b3872197928c7ea0123c5
entries: Array

Información TXT
host: codeforces.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=l4G0k0hCtL44oR2JYae12tG2VSyD0ig5OEN4oKGz6IY
entries: Array

Registro IPv6
host: codeforces.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:20::681a:7a4

Registro IPv6
host: codeforces.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:20::ac43:44fe

Registro IPv6
host: codeforces.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:20::681a:6a4