Robtex

Up: 2620:0:20::/43
Can't show all results, try to descend to a more specific CIDR
Down left: 2620:0:30::/45
Down right: 2620:0:38::/45
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2620:0:30::53	A+PTR	ns1.msft.net
2620:0:30::53	A	ns1-205.msecnd.net.msft.info
2620:0:30::53	A	ns1-205.onenote.net.msft.info
2620:0:32::53	PTR	ns2.msft.net
2620:0:32::53	A	ns2-01.mono-for-android.net.msftnet.org
2620:0:32::53	A	ns2-205.s-msn.com.msftnet.org
2620:0:34::53	PTR	ns3.msft.net
2620:0:34::53	A	ns3.msfttest.msft.net
2620:0:34::53	A	ns3-03.msmpartner.com.msft.info
2620:0:37::53	A+PTR	ns4.msft.net
2620:0:37::53	A	ns4.msfttest.msft.net
2620:0:37::53	A	a.msft.net