Tell Google Analytics to anonymize the information sent by the tracker objects by removing the last octet of the IP address prior to its storage.
https://code.google.com/apis/analytics/docs/gaJS/gaJSApi_gat.html
Analytics and Tracking
Get access to data on 2,711,378 websites that are Google Analytics Anonymize IP Customers. We know of 300,864 live websites using Google Analytics Anonymize IP and an additional 2,410,514 sites that used Google Analytics Anonymize IP historically and 121,002 websites in the United States.
Get a list of 2,711,378 websites using Google Analytics Anonymize IP which includes location information, hosting data, contact details, 300,864 currently live websites and an additional 199,974 domains that redirect to sites in this list. 2,410,514 sites that used this technology previouslyand 121,002 websites in the United States currently using Google Analytics Anonymize IP.
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