From: barmar@alum.mit.edu   
      
   In article ,   
    Hongyi Zhao  wrote:   
      
   > Hi all,   
   >   
   > I want to select the IP addresses belong to university, college, or   
   > academic institutions from a given IP addresses list.  For example,   
   > from the following  IP addresses list:   
   >   
   > ...   
   > 120.136.18.167   
   > 120.50.40.184   
   > 121.133.186.164   
   > 121.74.17.78   
   > 122.155.3.145   
   > 122.160.172.24   
   > 122.49.203.249   
   > 123.108.108.147   
   > 124.120.243.152   
   > 124.217.230.88   
   > 124.217.246.242   
   > 124.83.16.231   
   > 125.129.114.149   
   > 125.243.45.13   
   > 128.151.84.46   
   > 128.237.226.86   
   > ...   
   >   
   > Is there any quick and accurate method for this purpose?  Any hints   
   > will be highly appreciated.  Thanks in advance.   
      
   You could do reverse lookups, and check for hostnames ending in .edu,   
   .edu., or .ac..   
      
   --   
   Barry Margolin, barmar@alum.mit.edu   
   Arlington, MA   
   *** PLEASE don't copy me on replies, I'll read them in the group ***   
      
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