WordPress Version 3.9.*
https://make.wordpress.org/core/version-3-9-project-schedule/
Content Management System
Get access to data on 1,978,574 websites that are Wordpress 3.9 Customers. We know of 52,883 live websites using Wordpress 3.9 and an additional 1,925,691 sites that used Wordpress 3.9 historically and 24,392 websites in the United States.
Get a list of 1,978,574 websites using Wordpress 3.9 which includes location information, hosting data, contact details, 52,883 currently live websites and an additional 11,870 domains that redirect to sites in this list. 1,925,691 sites that used this technology previously and 24,392 websites in the United States currently using Wordpress 3.9.
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