Robtex

Up: 210.18.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 210.18.0.0/22
Down right: 210.18.4.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.18.0.0	PTR	210.18.0.0.sify.net
210.18.0.2	PTR	210.18.0.2.sify.net
210.18.0.6	A	210.18.0.6.sify.net
210.18.0.13	A	210.18.0.13.sify.net
210.18.0.17	PTR	210.18.0.17.sify.net
210.18.0.40	A	210.18.0.40.sify.net
210.18.0.41	A+PTR	210.18.0.41.sify.net
210.18.0.42	A+PTR	210.18.0.42.sify.net
210.18.0.55	A	210.18.0.55.sify.net
210.18.0.59	A+PTR	210.18.0.59.sify.net
210.18.0.60	A	210.18.0.60.sify.net
210.18.0.64	PTR	210.18.0.64.sify.net
210.18.0.73	A+PTR	210.18.0.73.sify.net
210.18.0.84	A	210.18.0.84.sify.net
210.18.0.87	A	210.18.0.87.sify.net
210.18.0.89	A+PTR	210.18.0.89.sify.net
210.18.0.95	A	210.18.0.95.sify.net
210.18.0.99	A+PTR	210.18.0.99.sify.net
210.18.0.103	A	210.18.0.103.sify.net
210.18.0.104	A	210.18.0.104.sify.net
210.18.0.106	A+PTR	210.18.0.106.sify.net
210.18.0.116	A	210.18.0.116.sify.net
210.18.0.120	A+PTR	210.18.0.120.sify.net
210.18.0.145	PTR	210.18.0.145.sify.net
210.18.0.158	A	210.18.0.158.sify.net
210.18.0.167	A	210.18.0.167.sify.net
210.18.0.169	A+PTR	210.18.0.169.sify.net
210.18.0.187	A+PTR	210.18.0.187.sify.net
210.18.0.194	A+PTR	210.18.0.194.sify.net
210.18.0.216	A+PTR	210.18.0.216.sify.net
210.18.0.221	A	210.18.0.221.sify.net
210.18.1.0	PTR	210.18.1.0.sify.net
210.18.1.9	PTR	210.18.1.9.sify.net
210.18.1.11	A+PTR	210.18.1.11.sify.net
210.18.1.18	PTR	210.18.1.18.sify.net
210.18.1.20	A	210.18.1.20.sify.net
210.18.1.41	PTR	210.18.1.41.sify.net
210.18.1.44	A	210.18.1.44.sify.net
210.18.1.49	PTR	210.18.1.49.sify.net
210.18.1.64	PTR	210.18.1.64.sify.net
210.18.1.71	A	210.18.1.71.sify.net
210.18.1.73	PTR	210.18.1.73.sify.net
210.18.1.98	PTR	210.18.1.98.sify.net
210.18.1.129	A+PTR	210.18.1.129.sify.net
210.18.2.0	A+PTR	210.18.2.0.sify.net
210.18.2.16	A	210.18.2.16.sify.net
210.18.2.27	PTR	210.18.2.27.sify.net
210.18.2.116	A	210.18.2.116.sify.net
210.18.2.196	A	210.18.2.196.sify.net
210.18.2.224	PTR	210.18.2.224.sify.net
210.18.2.235	PTR	210.18.2.235.sify.net
210.18.3.0	A+PTR	210.18.3.0.sify.net
210.18.3.3	A+PTR	services.sify.com
210.18.3.6	A	pdns.sifytech.net
210.18.3.6	A	pdns.sify.in
210.18.3.10	PTR	210.18.3.10.sify.net
210.18.3.10	A	rightplusleft.com
210.18.3.10	A	truckwalla.com
210.18.3.18	PTR	210.18.3.18.sify.net
210.18.3.18	A	blogs.franzvision.easypowerprelaunch.info
210.18.3.18	A	esicregn.sifyitest.com
210.18.3.25	A	pg.sifyitest.com
210.18.3.51	PTR	210.18.3.51.sify.net
210.18.3.51	A	registration.sifyitest.com
210.18.3.52	A	registration.sifyitest.com
210.18.3.53	A	registration.sifyitest.com
210.18.3.54	A	registration.sifyitest.com
210.18.3.73	A+PTR	210.18.3.73.sify.net
210.18.3.73	A	uidai.sifyitest.com
210.18.3.134	A	online.arclimited.com
210.18.3.136	PTR	www.appscale.com
210.18.3.158	A	mafoi.in
210.18.3.191	A	210.18.3.191.sify.net
210.18.4.114	A	210.18.4.114.sify.net
210.18.4.194	A+PTR	210.18.4.194.sify.net
210.18.5.5	A	mx.sify.com
210.18.5.9	A	cokmaildb.sify.net
210.18.5.10	A	cokrelay1.sify.net
210.18.5.11	A	cokrelay2.sify.net
210.18.5.12	A	cokrelay3.sify.net
210.18.5.67	PTR	210.18.5.67.sify.net
210.18.5.88	PTR	210.18.5.88.sify.net
210.18.5.91	A	210.18.5.91.sify.net
210.18.5.92	A	210.18.5.92.sify.net
210.18.5.199	A	210.18.5.199.sify.net
210.18.5.255	A	210.18.5.255.sify.net
210.18.7.244	A	210.18.7.244.sify.net