Robtex

Up: 125.23.136.0/21
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Down left: 125.23.136.0/23
Down right: 125.23.138.0/23

IP	Type	Hostname
125.23.136.51	PTR	dsl-mp-dynamic-051.136.23.125.airtelbroadband.in
125.23.137.113	PTR	dsl-mp-dynamic-113.137.23.125.airtelbroadband.in
125.23.137.157	PTR	dsl-mp-dynamic-157.137.23.125.airtelbroadband.in
125.23.139.6	PTR	dsl-mp-dynamic-006.139.23.125.airtelbroadband.in