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 2,726,114 websites that are Google Analytics Anonymize IP Customers. We know of 297,867 live websites using Google Analytics Anonymize IP and an additional 2,428,247 sites that used Google Analytics Anonymize IP historically and 119,258 websites in the United States.
Get a list of 2,726,114 websites using Google Analytics Anonymize IP which includes location information, hosting data, contact details, 297,867 currently live websites and an additional 195,853 domains that redirect to sites in this list. 2,428,247 sites that used this technology previouslyand 119,258 websites in the United States currently using Google Analytics Anonymize IP.
Countries
Financial
Group
Region