Robtex

Up: 13.107.24.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 13.107.24.0/24
Down right: 13.107.25.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.107.24.1	A+PTR	ns3-01.azure-dns.org
13.107.24.1	A	ns3-01.mono-for-android.net.msft.info
13.107.24.1	A	ns3-01.utilityhpc.net.msft.info
13.107.24.2	A+PTR	ns3-02.azure-dns.org
13.107.24.2	A	ns1prod.6913.azuredns-prd.info
13.107.24.2	A	ns1prod.205.azuredns-prd.info
13.107.24.3	PTR	ns3-03.azure-dns.org
13.107.24.4	PTR	ns3-04.azure-dns.org
13.107.24.4	A	ns1prod.172.azuredns-prd.info
13.107.24.4	A	ns3-04.agnitio.net.msft.info
13.107.24.5	PTR	ns3-05.azure-dns.org
13.107.24.6	A+PTR	ns3-06.azure-dns.org
13.107.24.6	A	ns1prod.6893.azuredns-prd.info
13.107.24.6	A	ns1prod.11193.azuredns-prd.info
13.107.24.7	PTR	ns3-07.azure-dns.org
13.107.24.8	A+PTR	ns3-08.azure-dns.org
13.107.24.8	A	ns3-08.swiftkeyhealthcare.com.msft.info
13.107.24.8	A	ns1prod.5611.azuredns-prd.info
13.107.24.9	PTR	ns3-09.azure-dns.org
13.107.24.10	A+PTR	ns3-10.azure-dns.org
13.107.24.201	A+PTR	ns3-201.azure-dns.org
13.107.24.201	A	ns1prod.arpa-201.azuredns-prd.info
13.107.24.201	A	ns3.azprdmig.msft.net
13.107.24.202	A+PTR	ns3-202.azure-dns.org
13.107.24.203	A+PTR	ns3-203.azure-dns.org
13.107.24.204	A+PTR	ns3-204.azure-dns.org
13.107.24.205	PTR	ns3-205.azure-dns.org
13.107.24.205	A	ns3-205.sharepointonline.com.msft.info
13.107.24.205	A	ns3-205.s-microsoft.com.msft.info
13.107.24.208	A+PTR	ns3-208.azure-dns.org
13.107.24.208	A	hensconsulting.com
13.107.24.208	A	dns3.agenciaopen.com
13.107.24.221	A	ns3.sharepoint.com.msft.info
13.107.24.221	A	ns3-221.azure-dns.org
13.107.24.224	A+PTR	ns3-224.azure-dns.org
13.107.24.224	A	ns1prod.41087.azuredns-prd.info
13.107.24.224	A	ns1prod.122.azuredns-prd.info
13.107.24.225	A+PTR	ns3-225.azure-dns.org