WordPress default theme from 2011
https://wordpress.org/themes/twentyeleven
Frameworks · WordPress Theme
Get access to data on 431,999 websites Twenty Eleven Customers. We know of 82,196 live websites using Twenty Eleven and an additional 349,803 sites that used Twenty Eleven historically and 35,910 websites in the United States.
Get a list of 431,999 websites using Twenty Eleven which includes location information, hosting data, contact details, 82,196 currently live websites and an additional 29,795 domains that redirect to sites in this list. 349,803 sites that used this technology previouslyand 35,910 websites in the United States currently using Twenty Eleven.
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