Robtex

Up: 221.135.38.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 221.135.39.0/25
Down right: 221.135.39.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.135.39.1	PTR	221-135-39-1.sify.net
221.135.39.1	A	www.asbi.co.in
221.135.39.1	A	*.asbi.co.in
221.135.39.114	PTR	lotusmail.astarc-agro.com
221.135.39.114	PTR	lotusmail.astarc.com
221.135.39.114	PTR	lotusmail.classicstripes.com
221.135.39.122	PTR	221-135-39-122.sify.net
221.135.39.146	PTR	221-135-39-146.sify.net
221.135.39.146	A	gharkharido.com
221.135.39.146	A	stupidengineer.com
221.135.39.149	A	ns3.smiffer.com
221.135.39.149	A	mail.ns3.smiffer.com
221.135.39.149	A	mail.gleron.com
221.135.39.150	A	ns2.smiffer.com
221.135.39.185	PTR	221-135-39-185.sify.net