Robtex

Up: 182.71.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 182.71.20.0/23
Down right: 182.71.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
182.71.20.26	PTR	nsg-static-026.20.71.182.airtel.in
182.71.20.28	PTR	nsg-static-028.20.71.182.airtel.in
182.71.20.28	A	imail1.spanservices.com
182.71.20.37	PTR	nsg-static-037.20.71.182.airtel.in
182.71.20.46	PTR	nsg-static-046.20.71.182.airtel.in
182.71.20.69	A	mail1.esoftwork.com
182.71.20.70	A	webworldatom.com
182.71.20.72	A	esferasoft.net
182.71.20.120	PTR	nsg-static-120.20.71.182.airtel.in
182.71.21.2	PTR	nsg-static-002.21.71.182.airtel.in
182.71.21.2	A	mail.widexindia.com
182.71.21.59	PTR	nsg-static-059.21.71.182.airtel.in
182.71.21.98	PTR	synergytelecommunications.com
182.71.21.102	PTR	nsg-static-102.21.71.182.airtel.in
182.71.21.180	A+PTR	mail.foresolutions.net
182.71.21.181	PTR	nsg-static-181.21.71.182.airtel.in
182.71.21.182	PTR	mail.foresolutions.net
182.71.21.182	A	webmail.foresolutions.net
182.71.21.219	PTR	nsg-static-219.21.71.182.airtel.in
182.71.21.226	PTR	nsg-static-226.21.71.182.airtel.in
182.71.21.226	A	mail.pumasource.in
182.71.21.252	PTR	mail.pbdwss.gov.in
182.71.21.253	PTR	nsg-static-253.21.71.182.airtel.in
182.71.21.253	A	www.confiar.in
182.71.21.253	A	www.klexserve.com
182.71.22.2	PTR	nsg-static-002.22.71.182.airtel.in
182.71.22.2	A	ns4b.wswork.biz
182.71.22.5	PTR	nsg-static-005.22.71.182.airtel.in
182.71.22.5	A	mail.winshuttle.in
182.71.22.16	PTR	nsg-static-016.22.71.182.airtel.in
182.71.22.29	PTR	nsg-static-029.22.71.182.airtel.in
182.71.22.88	PTR	nsg-static-088.22.71.182.airtel.in
182.71.22.106	PTR	nsg-static-106.22.71.182.airtel.in
182.71.22.163	A	mail2.greyb.com
182.71.22.227	A	mail.heroeco.com
182.71.22.255	PTR	nsg-static-255.22.71.182.airtel.in
182.71.23.2	PTR	nsg-static-002.23.71.182.airtel.in
182.71.23.2	A	indichoice.com
182.71.23.2	A	wap.indichoice.com
182.71.23.7	PTR	nsg-static-007.23.71.182.airtel.in
182.71.23.8	PTR	nsg-static-008.23.71.182.airtel.in
182.71.23.17	PTR	nsg-static-017.23.71.182.airtel.in
182.71.23.106	PTR	nsg-static-106.23.71.182.airtel.in
182.71.23.155	PTR	nsg-static-155.23.71.182.airtel.in
182.71.23.155	A	mail240.xicom.info
182.71.23.155	A	xicom.info
182.71.23.157	PTR	nsg-static-157.23.71.182.airtel.in
182.71.23.157	A	mail240.xicom.info
182.71.23.157	A	xicom.info
182.71.23.158	PTR	nsg-static-158.23.71.182.airtel.in
182.71.23.168	PTR	nsg-static-168.23.71.182.airtel.in
182.71.23.169	PTR	nsg-static-169.23.71.182.airtel.in
182.71.23.170	PTR	nsg-static-170.23.71.182.airtel.in
182.71.23.171	PTR	nsg-static-171.23.71.182.airtel.in
182.71.23.172	PTR	nsg-static-172.23.71.182.airtel.in
182.71.23.173	PTR	nsg-static-173.23.71.182.airtel.in
182.71.23.174	PTR	nsg-static-174.23.71.182.airtel.in
182.71.23.175	PTR	nsg-static-175.23.71.182.airtel.in
182.71.23.182	A	roomkhojo.com
182.71.23.194	A+PTR	exchange.svilindia.com
182.71.23.194	PTR	www.svilindia.com
182.71.23.194	A+PTR	mail-india.tbvc.com
182.71.23.206	PTR	nsg-static-206.23.71.182.airtel.in
182.71.23.245	PTR	nsg-static-245.23.71.182.airtel.in