Robtex

Up: 221.135.62.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 221.135.62.0/25
Down right: 221.135.62.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.135.62.10	PTR	221-135-62-10.sify.net
221.135.62.11	PTR	221-135-62-11.sify.net
221.135.62.12	PTR	221-135-62-12.sify.net
221.135.62.29	PTR	221-135-62-29.sify.net
221.135.62.30	PTR	221-135-62-30.sify.net
221.135.62.32	PTR	221-135-62-32.sify.net
221.135.62.33	A+PTR	bs.bsmail.in
221.135.62.33	A	mx.smartinvestor.in
221.135.62.33	A	mx1.bsmail.in
221.135.62.34	A+PTR	smtpmum.business-standard.com
221.135.62.37	A+PTR	smtpmum.bsmail.in
221.135.62.38	PTR	221-135-62-38.sify.net
221.135.62.38	A	www.bsmail.in
221.135.62.38	A	business-standard.net.in
221.135.62.47	PTR	221-135-62-47.sify.net
221.135.62.56	PTR	221-135-62-56.sify.net
221.135.62.57	PTR	221-135-62-57.sify.net
221.135.62.67	PTR	221-135-62-67.sify.net
221.135.62.69	PTR	221-135-62-69.sify.net
221.135.62.70	PTR	221-135-62-70.sify.net
221.135.62.71	PTR	221-135-62-71.sify.net
221.135.62.75	PTR	221-135-62-75.sify.net
221.135.62.77	PTR	221-135-62-77.sify.net
221.135.62.79	PTR	221-135-62-79.sify.net
221.135.62.80	PTR	221-135-62-80.sify.net
221.135.62.83	PTR	221-135-62-83.sify.net
221.135.62.87	PTR	221-135-62-87.sify.net
221.135.62.90	PTR	221-135-62-90.sify.net
221.135.62.97	PTR	221-135-62-97.sify.net
221.135.62.103	PTR	221-135-62-103.sify.net
221.135.62.115	PTR	221-135-62-115.sify.net
221.135.62.117	PTR	221-135-62-117.sify.net
221.135.62.118	PTR	221-135-62-118.sify.net
221.135.62.119	PTR	221-135-62-119.sify.net
221.135.62.122	PTR	221-135-62-122.sify.net
221.135.62.128	PTR	221-135-62-128.sify.net
221.135.62.134	PTR	221-135-62-134.sify.net
221.135.62.136	PTR	221-135-62-136.sify.net
221.135.62.141	PTR	221-135-62-141.sify.net
221.135.62.146	PTR	221-135-62-146.sify.net
221.135.62.148	PTR	221-135-62-148.sify.net
221.135.62.156	PTR	221-135-62-156.sify.net
221.135.62.158	PTR	221-135-62-158.sify.net
221.135.62.159	PTR	221-135-62-159.sify.net
221.135.62.166	PTR	221-135-62-166.sify.net
221.135.62.168	PTR	221-135-62-168.sify.net
221.135.62.169	PTR	221-135-62-169.sify.net
221.135.62.173	PTR	221-135-62-173.sify.net
221.135.62.174	PTR	221-135-62-174.sify.net
221.135.62.175	PTR	221-135-62-175.sify.net
221.135.62.176	PTR	221-135-62-176.sify.net
221.135.62.178	PTR	221-135-62-178.sify.net
221.135.62.187	PTR	221-135-62-187.sify.net
221.135.62.190	PTR	221-135-62-190.sify.net
221.135.62.191	PTR	221-135-62-191.sify.net
221.135.62.203	PTR	221-135-62-203.sify.net
221.135.62.206	PTR	221-135-62-206.sify.net
221.135.62.207	PTR	221-135-62-207.sify.net
221.135.62.209	PTR	221-135-62-209.sify.net
221.135.62.214	PTR	221-135-62-214.sify.net
221.135.62.216	PTR	221-135-62-216.sify.net
221.135.62.219	PTR	221-135-62-219.sify.net
221.135.62.222	PTR	221-135-62-222.sify.net
221.135.62.224	PTR	221-135-62-224.sify.net
221.135.62.226	PTR	221-135-62-226.sify.net
221.135.62.227	PTR	221-135-62-227.sify.net
221.135.62.228	PTR	221-135-62-228.sify.net
221.135.62.234	PTR	221-135-62-234.sify.net
221.135.62.236	PTR	221-135-62-236.sify.net
221.135.62.238	PTR	221-135-62-238.sify.net
221.135.62.247	PTR	221-135-62-247.sify.net
221.135.62.255	PTR	221-135-62-255.sify.net