Registro IPv4
host: ntp1.glb.nist.gov
class: IN
ttl: 132
type: A
ip: 128.138.141.172

host: time.nist.gov
class: IN
ttl: 300
type: CNAME
target: ntp1.glb.nist.gov

Registro IPv6
host: ntp1.glb.nist.gov
class: IN
ttl: 113
type: AAAA
ipv6: 2610:20:6f97:97::6