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 2,692,958 websites that are Google Analytics Anonymize IP Customers. We know of 314,871 live websites using Google Analytics Anonymize IP and an additional 2,378,087 sites that used Google Analytics Anonymize IP historically and 127,835 websites in the United States.
Get a list of 2,692,958 websites using Google Analytics Anonymize IP which includes location information, hosting data, contact details, 314,871 currently live websites and an additional 210,731 domains that redirect to sites in this list. 2,378,087 sites that used this technology previouslyand 127,835 websites in the United States currently using Google Analytics Anonymize IP.
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