http://bgp.he.net/
http://cn.bing.com/search?q=ip%3A220.181.111.85
http://dns.aizhan.com/?q=www.baidu.com
http://ip.robtex.com/
http://rootkit.net.cn/index.aspx，查c段的话：http://c.wlan.im/
http://sameip.org/
http://tool.114la.com/sameip/
http://tool.chinaz.com/Same/
http://www.yougetsignal.com/tools/web-sites-on-web-server/，菜刀里面的。

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