Robtex

Up: 203.212.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.212.64.0/23
Down right: 203.212.66.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.212.64.2	A	mail.cellnext.com
203.212.64.12	PTR	cellnext.com
203.212.64.26	A	bkpapi.myvaluefirst.com
203.212.64.103	PTR	203-212-64-103.cellnext.com
203.212.64.211	PTR	203-212-64-211.cellnext.com
203.212.64.220	PTR	203-212-64-220.cellnext.com
203.212.65.25	A	mach3academy.com
203.212.65.25	A	pgselena.com
203.212.65.25	A	pgfuturex.com
203.212.67.23	A	quickest50.com
203.212.67.23	A	foodzaa.com
203.212.67.23	A	fullonbids.com
203.212.67.101	A	tweetrix.com
203.212.67.156	A	pepvfirst.com
203.212.67.160	A	pepvfirst.com
203.212.67.250	PTR	mailfirst.in
203.212.67.250	A	vfairmail.com