Registro IPv4
host: 21sci.com
class: IN
ttl: 300
type: A
ip: 172.67.197.81

Registro IPv4
host: 21sci.com
class: IN
ttl: 300
type: A
ip: 104.21.21.87

Servidores DNS Principal (mname) y Secundario (rname)
host: 21sci.com
class: IN
ttl: 1800
type: SOA
mname: harleigh.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2359887010
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Registro IPv6
host: 21sci.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3031::ac43:c551

Registro IPv6
host: 21sci.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3034::6815:1557