Robtex

Up: 64.4.48.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 64.4.48.0/24
Down right: 64.4.49.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.4.48.1	A+PTR	ns2-01.azure-dns.net
64.4.48.1	A	ns1prod.6913.azuredns-prd.info
64.4.48.1	A	ns2prod.20932.azuredns-prd.org
64.4.48.2	A+PTR	ns2-02.azure-dns.net
64.4.48.2	A	ns2prod.6913.azuredns-prd.org
64.4.48.2	A	ns2prod.205.azuredns-prd.org
64.4.48.3	PTR	ns2-03.azure-dns.net
64.4.48.4	A+PTR	ns2-04.azure-dns.net
64.4.48.4	A	ns2prod.111.azuredns-prd.org
64.4.48.4	A	ns2prod.172.azuredns-prd.org
64.4.48.5	PTR	ns2-05.azure-dns.net
64.4.48.6	PTR	ns2-06.azure-dns.net
64.4.48.6	A	ns2prod.6893.azuredns-prd.org
64.4.48.6	A	ns2prod.11193.azuredns-prd.org
64.4.48.7	PTR	ns2-07.azure-dns.net
64.4.48.8	A+PTR	ns2-08.azure-dns.net
64.4.48.8	A	ns4.hpservice.com.hk
64.4.48.8	A	ns2prod.5611.azuredns-prd.org
64.4.48.9	PTR	ns2-09.azure-dns.net
64.4.48.10	A+PTR	ns2-10.azure-dns.net
64.4.48.201	A+PTR	ns2-201.azure-dns.net
64.4.48.201	A	ns2prod.arpa-201.azuredns-prd.org
64.4.48.201	A	ns2prod.6403.azuredns-prd.org
64.4.48.202	A+PTR	ns2-202.azure-dns.net
64.4.48.203	A+PTR	ns2-203.azure-dns.net
64.4.48.204	A+PTR	ns2-204.azure-dns.net
64.4.48.205	PTR	ns2-205.azure-dns.net
64.4.48.205	A	ns2-205.botframework.com.msftnet.org
64.4.48.205	A	ns2-205.skype.com.msftnet.org
64.4.48.208	A+PTR	ns2-208.azure-dns.net
64.4.48.208	A	hensconsulting.com
64.4.48.208	A	nsp2.bdm.microsoftonline.com
64.4.48.221	A+PTR	ns2-221.azure-dns.net
64.4.48.221	A	ns2.sharepoint.com.msftnet.org
64.4.48.224	A+PTR	ns2-224.azure-dns.net
64.4.48.224	A	ns2prod.122.azuredns-prd.org
64.4.48.224	A	ns2prod.41087.azuredns-prd.org
64.4.48.225	A+PTR	ns2-225.azure-dns.net