Robtex

Up: 210.210.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.210.21.0/25
Down right: 210.210.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.210.21.0	PTR	210-210-21-0.lan.sify.net
210.210.21.1	PTR	210-210-21-1.lan.sify.net
210.210.21.2	PTR	210-210-21-2.lan.sify.net
210.210.21.3	A+PTR	210-210-21-3.lan.sify.net
210.210.21.4	PTR	210-210-21-4.lan.sify.net
210.210.21.5	PTR	210-210-21-5.lan.sify.net
210.210.21.6	PTR	210-210-21-6.lan.sify.net
210.210.21.7	A+PTR	210-210-21-7.lan.sify.net
210.210.21.8	PTR	210-210-21-8.lan.sify.net
210.210.21.9	PTR	210-210-21-9.lan.sify.net
210.210.21.10	A+PTR	210-210-21-10.lan.sify.net
210.210.21.12	A+PTR	210-210-21-12.lan.sify.net
210.210.21.12	A	www.esselpropack.com
210.210.21.12	A	esselpropack.com
210.210.21.13	PTR	210-210-21-13.lan.sify.net
210.210.21.15	A	210-210-21-15.lan.sify.net
210.210.21.16	A	210-210-21-16.lan.sify.net
210.210.21.24	A	210-210-21-24.lan.sify.net
210.210.21.25	A+PTR	210-210-21-25.lan.sify.net
210.210.21.38	A	210-210-21-38.lan.sify.net
210.210.21.40	A	210-210-21-40.lan.sify.net
210.210.21.45	A	210-210-21-45.lan.sify.net
210.210.21.46	A	210-210-21-46.lan.sify.net
210.210.21.47	A	210-210-21-47.lan.sify.net
210.210.21.49	A	210-210-21-49.lan.sify.net
210.210.21.50	PTR	webmail.lichousing.com
210.210.21.52	A	210-210-21-52.lan.sify.net
210.210.21.57	A	210-210-21-57.lan.sify.net
210.210.21.59	A	210-210-21-59.lan.sify.net
210.210.21.67	A+PTR	bsvmail.bharatserums.com
210.210.21.69	A+PTR	210-210-21-69.lan.sify.net
210.210.21.73	PTR	mail.modi.com
210.210.21.75	PTR	210-210-21-75.lan.sify.net
210.210.21.80	A+PTR	210-210-21-80.lan.sify.net
210.210.21.81	A	210-210-21-81.lan.sify.net
210.210.21.85	A	210-210-21-85.lan.sify.net
210.210.21.89	A	210-210-21-89.lan.sify.net
210.210.21.90	A	210-210-21-90.lan.sify.net
210.210.21.91	A	210-210-21-91.lan.sify.net
210.210.21.96	A	210-210-21-96.lan.sify.net
210.210.21.97	A	gmrmumbai.sify.net
210.210.21.99	A	upi.billdesk.com
210.210.21.100	A+PTR	210-210-21-100.lan.sify.net
210.210.21.100	A	bill.torrentpower.com
210.210.21.105	A	210-210-21-105.lan.sify.net
210.210.21.109	A+PTR	210-210-21-109.lan.sify.net
210.210.21.112	A	210-210-21-112.lan.sify.net
210.210.21.114	A+PTR	210-210-21-114.lan.sify.net
210.210.21.114	A	mail.jindals.com
210.210.21.115	A	210-210-21-115.lan.sify.net
210.210.21.116	A	210-210-21-116.lan.sify.net
210.210.21.119	A	210-210-21-119.lan.sify.net
210.210.21.125	A	210-210-21-125.lan.sify.net
210.210.21.127	A	210-210-21-127.lan.sify.net
210.210.21.129	A	inoxmultiplexes.com
210.210.21.130	A	210-210-21-130.lan.sify.net
210.210.21.132	A+PTR	210-210-21-132.lan.sify.net
210.210.21.133	A	210-210-21-133.lan.sify.net
210.210.21.135	A	210-210-21-135.lan.sify.net
210.210.21.137	A+PTR	210-210-21-137.lan.sify.net
210.210.21.137	A	dos.gov.in
210.210.21.137	A	www.dos.gov.in
210.210.21.138	A	210-210-21-138.lan.sify.net
210.210.21.140	A	210-210-21-140.lan.sify.net
210.210.21.144	A	210-210-21-144.lan.sify.net
210.210.21.146	A	210-210-21-146.lan.sify.net
210.210.21.147	A	210-210-21-147.lan.sify.net
210.210.21.149	A	210-210-21-149.lan.sify.net
210.210.21.151	A	210-210-21-151.lan.sify.net
210.210.21.153	A+PTR	210-210-21-153.lan.sify.net
210.210.21.153	A	www.sbi.in
210.210.21.153	A	www.statebankofindia.com
210.210.21.158	A	210-210-21-158.lan.sify.net
210.210.21.162	A	210-210-21-162.lan.sify.net
210.210.21.166	A	210-210-21-166.lan.sify.net
210.210.21.169	A+PTR	210-210-21-169.lan.sify.net
210.210.21.170	A+PTR	210-210-21-170.lan.sify.net
210.210.21.171	A+PTR	210-210-21-171.lan.sify.net
210.210.21.172	A	210-210-21-172.lan.sify.net
210.210.21.173	A+PTR	210-210-21-173.lan.sify.net
210.210.21.174	PTR	210-210-21-174.lan.sify.net
210.210.21.176	A	210-210-21-176.lan.sify.net
210.210.21.178	A+PTR	210-210-21-178.lan.sify.net
210.210.21.178	A	videos.ndtv.com
210.210.21.178	A	ndtvconvergence.com
210.210.21.180	A+PTR	210-210-21-180.lan.sify.net
210.210.21.180	A	kweindialogistics.com
210.210.21.186	A	210-210-21-186.lan.sify.net
210.210.21.188	A	210-210-21-188.lan.sify.net
210.210.21.197	A	210-210-21-197.lan.sify.net
210.210.21.201	A	210-210-21-201.lan.sify.net
210.210.21.207	A	210-210-21-207.lan.sify.net
210.210.21.209	A	210-210-21-209.lan.sify.net
210.210.21.211	A	210-210-21-211.lan.sify.net
210.210.21.212	A	mydigitalsign.com
210.210.21.214	A	210-210-21-214.lan.sify.net
210.210.21.216	A	210-210-21-216.lan.sify.net
210.210.21.217	A+PTR	210-210-21-217.lan.sify.net
210.210.21.217	A	chikkers.com
210.210.21.217	A	fevicol.com
210.210.21.218	A	210-210-21-218.lan.sify.net
210.210.21.222	A	210-210-21-222.lan.sify.net
210.210.21.224	A	210-210-21-224.lan.sify.net
210.210.21.226	A	210-210-21-226.lan.sify.net
210.210.21.233	A+PTR	210-210-21-233.lan.sify.net
210.210.21.238	A	210-210-21-238.lan.sify.net
210.210.21.243	A	www.justprint.in
210.210.21.243	A	overniteexp.com
210.210.21.243	A	justprint.in
210.210.21.245	PTR	210-210-21-245.lan.sify.net
210.210.21.245	A	mail.overnitenet.com
210.210.21.245	A	*.overnitenet.com
210.210.21.247	A+PTR	210-210-21-247.lan.sify.net
210.210.21.249	A	210-210-21-249.lan.sify.net
210.210.21.250	A	210-210-21-250.lan.sify.net