Robtex

Up: 2a01:111:4000::/36
Can't show all results, try to descend to a more specific CIDR
Down left: 2a01:111:4000::/38
Down right: 2a01:111:4400::/38
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2a01:111:4000::1	A+PTR	ns3-01.azure-dns.org
2a01:111:4000::1	A	ns3-01.mono-for-android.net.msft.info
2a01:111:4000::1	A	ns3-01.utilityhpc.net.msft.info
2a01:111:4000::2	PTR	ns3-02.azure-dns.org
2a01:111:4000::3	PTR	ns3-03.azure-dns.org
2a01:111:4000::4	PTR	ns3-04.azure-dns.org