Robtex

Up: 203.171.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.171.240.0/22
Down right: 203.171.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.171.240.0	PTR	node-203-171-240-0.alliancebroadband.in
203.171.240.1	PTR	node-203-171-240-1.alliancebroadband.in
203.171.240.2	PTR	node-203-171-240-2.alliancebroadband.in
203.171.240.10	A+PTR	dns-abspl-a.alliancebroadband.in
203.171.240.11	A+PTR	dns-abspl-b.alliancebroadband.in
203.171.240.22	PTR	node-203-171-240-22.alliancebroadband.in
203.171.240.22	A	speedtest.alliancebroadband.in
203.171.241.26	PTR	node-203-171-241-26.alliancebroadband.in
203.171.241.26	A	mail.alliancephone.com
203.171.241.26	A	alliancephone.com
203.171.241.36	PTR	node-203-171-241-36.alliancebroadband.in
203.171.241.56	PTR	node-203-171-241-56.alliancebroadband.in
203.171.241.56	A	alliancebroadbandservices.com
203.171.241.56	A	mail.alliancekolkata.org
203.171.241.75	PTR	node-203-171-241-75.alliancebroadband.in
203.171.241.84	PTR	node-203-171-241-84.alliancebroadband.in
203.171.241.84	A	alliancebroadband.org
203.171.241.84	A	alliancekolkata.biz
203.171.241.162	PTR	node-203-171-241-162.alliancebroadband.in
203.171.242.10	PTR	node-203-171-242-10.alliancebroadband.in
203.171.242.12	A	r1---sn-5aap5ojx-jj0l.googlevideo.com
203.171.242.13	PTR	cache.google.com
203.171.242.13	A	r2.sn-5aap5ojx-jj0l.gvt1.com
203.171.242.13	A	r2---sn-5aap5ojx-jj0l.googlevideo.com
203.171.242.14	PTR	cache.google.com
203.171.242.14	A	r3.sn-5aap5ojx-jj0l.googlevideo.com
203.171.242.37	PTR	cache.google.com
203.171.242.44	PTR	cache.google.com
203.171.242.44	A	r1.sn-5aap5ojx-jj0s.googlevideo.com
203.171.242.44	A	r1---sn-5aap5ojx-jj0s.googlevideo.com
203.171.242.45	A	r2---sn-5aap5ojx-jj0s.googlevideo.com
203.171.242.45	A	r2.sn-5aap5ojx-jj0s.googlevideo.com
203.171.242.47	PTR	cache.google.com
203.171.242.76	PTR	cache.google.com
203.171.242.76	A	r1.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.77	PTR	cache.google.com
203.171.242.77	A	r2.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.78	PTR	cache.google.com
203.171.242.78	A	r3.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.79	PTR	cache.google.com
203.171.242.79	A	r4.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.80	PTR	cache.google.com
203.171.242.80	A	r5.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.81	PTR	cache.google.com
203.171.242.81	A	r6.sn-5aap5ojx-jj0e.googlevideo.com
203.171.242.132	PTR	node-203-171-242-132.alliancebroadband.in
203.171.242.250	PTR	node-203-171-242-250.alliancebroadband.in
203.171.243.1	PTR	node-203-171-243-1.alliancebroadband.in
203.171.243.31	PTR	node-203-171-243-31.alliancebroadband.in
203.171.243.126	PTR	node-203-171-243-126.alliancebroadband.in
203.171.243.145	PTR	node-203-171-243-145.alliancebroadband.in
203.171.243.145	A	scontent.fccu3-1.fna.fbcdn.net
203.171.243.146	PTR	node-203-171-243-146.alliancebroadband.in
203.171.243.146	A	video.fccu3-1.fna.fbcdn.net
203.171.243.160	PTR	node-203-171-243-160.alliancebroadband.in
203.171.243.160	A	instagram.fccu3-1.fna.fbcdn.net
203.171.243.161	PTR	node-203-171-243-161.alliancebroadband.in
203.171.243.161	A	media.fccu3-1.fna.whatsapp.net
203.171.244.9	PTR	node-203-171-244-9.alliancebroadband.in
203.171.244.252	PTR	node-203-171-244-252.alliancebroadband.in
203.171.244.252	A	supercraft.in
203.171.244.252	A	scsduttapulia.com
203.171.245.42	PTR	node-203-171-245-42.alliancebroadband.in
203.171.246.124	PTR	mail.onesolutionindia.com
203.171.246.153	PTR	node-203-171-246-153.alliancebroadband.in
203.171.246.250	PTR	mail.onesolution.org.in
203.171.246.250	A	mail.orangeart.in