Robtex

Up: 122.166.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 122.166.56.0/23
Down right: 122.166.58.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
122.166.56.174	PTR	mx.techvoyant.com
122.166.56.174	PTR	veritas.techvoyant.com
122.166.56.174	PTR	mail.outdu.com
122.166.57.19	PTR	cfindia.net
122.166.57.20	PTR	cfindia.net
122.166.57.21	PTR	cfindia.net
122.166.57.22	PTR	cfindia.net
122.166.57.27	PTR	abts-kk-static-027.57.166.122.airtelbroadband.in
122.166.57.46	PTR	mail.auma.co.in
122.166.57.66	PTR	abts-kk-static-066.57.166.122.airtelbroadband.in
122.166.57.119	A	backup-mail.excelindia.com
122.166.58.30	PTR	abts-kk-static-030.58.166.122.airtelbroadband.in
122.166.58.58	PTR	abts-kk-static-058.58.166.122.airtelbroadband.in
122.166.58.118	PTR	abts-kk-static-118.58.166.122.airtelbroadband.in
122.166.58.187	PTR	abts-kk-static-187.58.166.122.airtelbroadband.in
122.166.59.162	PTR	abts-kk-static-162.59.166.122.airtelbroadband.in
122.166.59.163	PTR	abts-kk-static-163.59.166.122.airtelbroadband.in
122.166.59.173	PTR	abts-kk-static-173.59.166.122.airtelbroadband.in
122.166.59.195	A	weirminerals.in
122.166.59.197	PTR	abts-kk-static-197.59.166.122.airtelbroadband.in
122.166.59.202	A	weirindia.com
122.166.59.205	A	mail.weirindia.com
122.166.59.211	PTR	abts-kk-static-211.59.166.122.airtelbroadband.in
122.166.59.215	PTR	abts-kk-static-215.59.166.122.airtelbroadband.in
122.166.59.236	PTR	abts-kk-static-236.59.166.122.airtelbroadband.in
122.166.59.240	PTR	abts-kk-static-240.59.166.122.airtelbroadband.in