Registro IPv4
host: ntp1.glb.nist.gov
class: IN
ttl: 291
type: A
ip: 132.163.97.3

host: time.nist.gov
class: IN
ttl: 192
type: CNAME
target: ntp1.glb.nist.gov

Registro IPv6
host: ntp1.glb.nist.gov
class: IN
ttl: 116
type: AAAA
ipv6: 2610:20:6f96:96::4