Robtex

Up: 2603:1040::/26
Can't show all results, try to descend to a more specific CIDR
Down left: 2603:1060::/28
Down right: 2603:1070::/28
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2603:1061::1	A+PTR	ns1-01.azure-dns.com
2603:1061::1	A	ns1.stroman-tromp.com
2603:1061::1	A	ns1-01.yahoobingnetwork.mx.msft.info
2603:1061::2	PTR	ns1-02.azure-dns.com
2603:1061::3	PTR	ns1-03.azure-dns.com