Robtex

Up: 182.71.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 182.71.128.0/23
Down right: 182.71.130.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
182.71.128.20	PTR	nsg-static-020.128.71.182.airtel.in
182.71.128.54	PTR	nsg-static-054.128.71.182.airtel.in
182.71.128.98	PTR	nsg-static-098.128.71.182.airtel.in
182.71.128.100	PTR	nsg-static-100.128.71.182.airtel.in
182.71.129.3	PTR	nsg-static-003.129.71.182.airtel.in
182.71.129.3	A	air3.books-systems.com
182.71.129.3	A	air3.booksuniversity.net
182.71.129.23	A	air23.books-systems.com
182.71.129.23	A	air23.booksuniversity.net
182.71.129.114	PTR	nsg-static-114.129.71.182.airtel.in
182.71.129.209	PTR	nsg-static-209.129.71.182.airtel.in
182.71.129.229	PTR	nsg-static-229.129.71.182.airtel.in
182.71.129.230	PTR	nsg-static-230.129.71.182.airtel.in
182.71.129.251	A+PTR	mailserver.mekaster.com
182.71.129.251	A	www.mekaster.com
182.71.129.251	A	mail.mekaster.com
182.71.130.11	PTR	nsg-static-011.130.71.182.airtel.in
182.71.130.90	PTR	nsg-static-090.130.71.182.airtel.in
182.71.130.90	A	mobicash.info
182.71.130.90	A	ziyamultiservices.com
182.71.130.137	PTR	nsg-static-137.130.71.182.airtel.in
182.71.130.164	PTR	nsg-static-164.130.71.182.airtel.in
182.71.130.192	PTR	nsg-static-192.130.71.182.airtel.in
182.71.130.234	PTR	nsg-static-234.130.71.182.airtel.in
182.71.130.235	PTR	nsg-static-235.130.71.182.airtel.in
182.71.130.255	PTR	nsg-static-255.130.71.182.airtel.in
182.71.131.53	PTR	nsg-static-053.131.71.182.airtel.in
182.71.131.160	PTR	nsg-static-160.131.71.182.airtel.in