Robtex

Up: 2001:12f8:a::/47
Can't show all results, try to descend to a more specific CIDR
Down left: 2001:12f8:b::/49
Down right: 2001:12f8:b:8000::/49

IP	Type	Hostname
2001:12f8:b:1::8	A+PTR	c.ntp.br
2001:12f8:b:1::8	A	pool.ntp.br
2001:12f8:b:1::11	A	b.sec.dns.br
2001:12f8:b:1::14	A	e.sec.dns.br