Robtex

Up: 182.75.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 182.75.16.0/22
Down right: 182.75.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
182.75.16.2	PTR	nsg-static-2.16.75.182-airtel.com
182.75.16.172	PTR	nsg-static-172.16.75.182-airtel.com
182.75.18.2	PTR	nsg-static-2.18.75.182-airtel.com
182.75.18.5	PTR	nsg-static-5.18.75.182-airtel.com
182.75.19.26	PTR	nsg-static-26.19.75.182-airtel.com
182.75.20.2	PTR	nsg-static-2.20.75.182-airtel.com
182.75.20.234	PTR	nsg-static-234.20.75.182-airtel.com
182.75.21.30	PTR	nsg-static-30.21.75.182-airtel.com
182.75.22.105	PTR	nsg-static-105.22.75.182-airtel.com
182.75.22.105	A	mail.becmpl.com
182.75.22.137	A	mail.cfiholding.com
182.75.22.242	PTR	nsg-static-242.22.75.182-airtel.com
182.75.22.246	PTR	nsg-static-246.22.75.182-airtel.com
182.75.22.246	A	ns1.emarketz.in
182.75.22.246	A	ns2.emarketz.in
182.75.23.2	PTR	nsg-static-2.23.75.182-airtel.com
182.75.23.147	PTR	nsg-static-147.23.75.182-airtel.com
182.75.23.147	A	cdsupjn.in