Robtex

Up: 66.102.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.102.248.0/23
Down right: 66.102.250.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.102.248.200	PTR	email.shonline.com
66.102.249.2	A	name3.chinatelecomglobal.com
66.102.251.24	A	sina.com
66.102.251.24	A	ca.weibo.com
66.102.251.24	A	mediakit.sina.com
66.102.251.33	A	sina.com
66.102.251.33	A	ca.weibo.com
66.102.251.33	A	www-mm12.com