Robtex

Up: 124.7.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 124.7.48.0/23
Down right: 124.7.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
124.7.48.245	PTR	segment-124-7.sify.net
124.7.49.248	PTR	segment-124-7.sify.net
124.7.50.255	PTR	segment-124-7.sify.net
124.7.51.0	PTR	segment-124-7.sify.net
124.7.51.7	PTR	segment-124-7.sify.net
124.7.51.8	PTR	segment-124-7.sify.net
124.7.51.9	PTR	segment-124-7.sify.net
124.7.51.10	PTR	segment-124-7.sify.net
124.7.51.10	A	mydevicealert.co.in
124.7.51.10	A	einsteindata.co.in
124.7.51.12	PTR	segment-124-7.sify.net
124.7.51.12	A	infraalert.com
124.7.51.13	PTR	segment-124-7.sify.net
124.7.51.13	A	infraenergydata.com
124.7.51.14	PTR	segment-124-7.sify.net
124.7.51.14	A	infraalert.co.in
124.7.51.20	PTR	segment-124-7.sify.net
124.7.51.21	PTR	segment-124-7.sify.net
124.7.51.58	PTR	segment-124-7.sify.net
124.7.51.60	PTR	segment-124-7.sify.net
124.7.51.61	PTR	segment-124-7.sify.net
124.7.51.65	PTR	segment-124-7.sify.net
124.7.51.74	PTR	segment-124-7.sify.net
124.7.51.75	PTR	segment-124-7.sify.net
124.7.51.82	PTR	segment-124-7.sify.net
124.7.51.84	A	saponeworld.com
124.7.51.109	PTR	segment-124-7.sify.net
124.7.51.127	PTR	segment-124-7.sify.net
124.7.51.139	PTR	segment-124-7.sify.net
124.7.51.139	A	ifbserv.com
124.7.51.140	PTR	segment-124-7.sify.net
124.7.51.140	A	cplprojects.com
124.7.51.140	A	ifbfreight.com
124.7.51.142	PTR	segment-124-7.sify.net
124.7.51.143	PTR	segment-124-7.sify.net
124.7.51.152	PTR	segment-124-7.sify.net
124.7.51.166	PTR	segment-124-7.sify.net
124.7.51.172	PTR	segment-124-7.sify.net
124.7.51.185	PTR	segment-124-7.sify.net
124.7.51.203	PTR	segment-124-7.sify.net
124.7.51.207	PTR	segment-124-7.sify.net
124.7.51.211	PTR	segment-124-7.sify.net
124.7.51.242	PTR	segment-124-7.sify.net
124.7.51.248	PTR	segment-124-7.sify.net
124.7.51.254	PTR	segment-124-7.sify.net
124.7.51.255	PTR	segment-124-7.sify.net