WordPress Version 3.9.*
https://make.wordpress.org/core/version-3-9-project-schedule/
Content Management System
Get access to data on 1,720,207 websites that are Wordpress 3.9 Customers. We know of 21,287 live websites using Wordpress 3.9 and an additional 1,698,920 sites that used Wordpress 3.9 historically and 9,198 websites in the United States.
Get a list of 1,720,207 websites using Wordpress 3.9 which includes location information, hosting data, contact details, 21,287 currently live websites and an additional 4,819 domains that redirect to sites in this list. 1,698,920 sites that used this technology previouslyand 9,198 websites in the United States currently using Wordpress 3.9.
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