diff --git a/ruby/lib/jam_ruby/models/max_mind_isp.rb b/ruby/lib/jam_ruby/models/max_mind_isp.rb
index cab07f862..2c7d6ed9a 100644
--- a/ruby/lib/jam_ruby/models/max_mind_isp.rb
+++ b/ruby/lib/jam_ruby/models/max_mind_isp.rb
@@ -13,9 +13,9 @@ module JamRuby
         MaxMindIsp.delete_all
         File.open(file, 'r:ISO-8859-1') do |io|
           io.gets  # eat the copyright line. gah, why do they have that in their file??
-          MaxMindIsp.pg_copy_from io, :map => { 'beginIp' => 'ip_start', 'endIp' => 'ip_end', 'countryCode' => 'country', 'ISP' => 'isp'}, :columns => [:beginIp, :endIp, :countryCode, :ISP] do |row|
-            row[0] = strip_quotes(row[0])
-            row[1] = strip_quotes(row[1])
+          MaxMindIsp.pg_copy_from io, :map => { 'beginIp' => 'ip_bottom', 'endIp' => 'ip_top', 'countryCode' => 'country', 'ISP' => 'isp'}, :columns => [:beginIp, :endIp, :countryCode, :ISP] do |row|
+            row[0] = ip_address_to_int(strip_quotes(row[0]))
+            row[1] = ip_address_to_int(strip_quotes(row[1]))
             row[2] = row[2]
             row[3] = row[3..-1].join(',')   # this is because the parser just cuts on any ',' and ignores double quotes.  essentially postgres-copy isn't a great csv parser -- or I need to configure it better
             while row.length > 4
@@ -27,6 +27,15 @@ module JamRuby
       end
     end
 
+    # Make an IP address fit in a signed int. Just divide it by 2, as the least significant part
+    # just can't possibly matter. We can verify this if needed. My guess is the entire bottom octet is
+    # actually irrelevant
+    def self.ip_address_to_int(ip)
+      ip.split('.').inject(0) {|total,value| (total << 8 ) + value.to_i} / 2
+    end
+
+    private
+
     def self.strip_quotes str
       return nil if str.nil?
 
@@ -45,4 +54,4 @@ module JamRuby
       str.gsub(/\"/, '""')
     end
   end
-end
+end
\ No newline at end of file