I will give you a list of 716,000 active sites using CMS Drupal
The list contain only domain names.
domain.com
domain.de
domain.it
...
updated : 2 May 2017
File : TXT
ZIP Compressed
Get website lists and analyze them for your needs.
I do not provide any whois/contact information.
How I get data?
I crawl hundreds millions of websites each week and scan each of them for the technology they use.
'Technology' means a module, plugin, CMS, advertising platform, shopping cart, ecommerce engine, analytic system etc. the website is using.
Each website has special technology 'signatures' in its code.