Robtex

Up: 121.243.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.243.0.0/22
Down right: 121.243.4.0/22

IP	Type	Hostname
121.243.1.2	PTR	121.243.1.2.man-static.vsnl.net.in
121.243.1.2	A	ns1.gec.ac.in
121.243.1.162	PTR	mail.brother.in
121.243.1.179	PTR	infina.in
121.243.1.224	PTR	mail.fpaindia.org
121.243.6.91	A	sbifunds.com