Robtex

Up: 66.212.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.212.21.0/25
Down right: 66.212.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.212.21.5	A+PTR	m1.x1n.org
66.212.21.5	A	xtywk.com
66.212.21.5	A	mail.abetterlife.com
66.212.21.7	A	ns2.prickles.co
66.212.21.71	A	routing.rizon.net
66.212.21.71	A	forum.rizon.net
66.212.21.71	A	www.rizon.net
66.212.21.229	PTR	unassigned.quadranet.com
66.212.21.237	A	chinachunfei.com
66.212.21.238	A	www.yjxqx.cn