Robtex

Up: 221.134.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 221.134.28.0/23
Down right: 221.134.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.134.28.0	PTR	221-134-28-0.sify.net
221.134.28.25	A	emgateway.emaarmgf.com
221.134.28.101	PTR	221-134-28-101.sify.net
221.134.28.196	A+PTR	exht01.infoedge.com
221.134.28.197	PTR	221-134-28-197.sify.net
221.134.28.197	A	exht01.infoedge.com
221.134.28.198	A	excas1.infoedge.com
221.134.28.199	A	excas1.infoedge.com
221.134.28.202	PTR	221-134-28-202.sify.net
221.134.28.202	A	mail.resmail.in
221.134.28.203	PTR	221-134-28-203.sify.net
221.134.28.203	A	resumepedia.naukri.com
221.134.28.204	PTR	221-134-28-204.sify.net
221.134.28.204	A	vmscanus.firstnaukri.com
221.134.28.204	A	vmscanus.naukri.com
221.134.28.216	A	exht02.infoedge.com
221.134.28.230	A	excas2.infoedge.com
221.134.28.232	PTR	221-134-28-232.sify.net
221.134.28.232	A	avasin.jeevansathi.com
221.134.28.232	A	avasin.shiksha.com
221.134.28.233	PTR	221-134-28-233.sify.net
221.134.28.238	A	resumeservices.naukri.com
221.134.28.241	A	excas2.infoedge.com
221.134.28.251	A	exht02.infoedge.com
221.134.30.0	PTR	221-134-30-0.sify.net