Robtex

Up: 121.44.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 121.44.20.0/23
Down right: 121.44.22.0/23

IP	Type	Hostname
121.44.21.203	A	thewoodys.id.au
121.44.22.2	A+PTR	ppp121-44-22-2.lns20.syd4.internode.on.net
121.44.22.101	PTR	ppp121-44-22-101.lns20.syd4.internode.on.net
121.44.23.93	A	ppp121-44-23-93.lns10.syd7.internode.on.net
121.44.23.95	A	ppp121-44-23-95.lns10.syd7.internode.on.net
121.44.23.97	A	ppp121-44-23-97.lns10.syd7.internode.on.net
121.44.23.141	PTR	ppp121-44-23-141.lns20.syd4.internode.on.net
121.44.23.191	A+PTR	ppp121-44-23-191.lns20.syd4.internode.on.net
121.44.23.211	PTR	ppp121-44-23-211.lns20.syd6.internode.on.net
121.44.23.211	A	mail.red2.com.au
121.44.23.243	A+PTR	ppp121-44-23-243.lns20.syd4.internode.on.net
121.44.23.252	A+PTR	ppp121-44-23-252.lns20.syd4.internode.on.net
121.44.23.253	A+PTR	ppp121-44-23-253.lns20.syd4.internode.on.net