Robtex

Up: 111.221.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 111.221.68.0/23
Down right: 111.221.70.0/23

IP	Type	Hostname
111.221.68.171	A	www.microsoftonline.com.nsatc.net
111.221.69.6	PTR	vlan551.hkn-f6x-stbos-1b.ntwk.msn.net
111.221.69.141	A+PTR	hkn.outlook.com
111.221.69.142	PTR	hknprd0102.outlook.com
111.221.69.250	PTR	wildcard-apacnorth.um.outlook.com
111.221.70.11	A	cds1.icn9.msecn.net
111.221.70.12	A+PTR	cds2.icn9.msecn.net
111.221.70.17	A+PTR	cds7.icn9.msecn.net
111.221.70.20	A+PTR	cds10.icn9.msecn.net
111.221.70.22	A	cds12.icn9.msecn.net
111.221.70.32	PTR	pcds2.icn9.msecn.net
111.221.70.62	PTR	csm2.icn9.msecn.net
111.221.71.16	A	cds6.tpa9.msecn.net