Registro IPv4
host: keyhole.l.google.com
class: IN
ttl: 300
type: A
ip: 216.58.215.142

host: kh.google.com
class: IN
ttl: 300
type: CNAME
target: keyhole.l.google.com

Registro IPv6
host: keyhole.l.google.com
class: IN
ttl: 300
type: AAAA
ipv6: 2a00:1450:4003:800::200e