This site brings back a Win32 header message.
https://microsoft.com
Operating Systems and Servers
Get access to data on 807,527 websites Win32 Header Customers. We know of 51,918 live websites using Win32 Header and an additional 755,609 sites that used Win32 Header historically and 18,867 websites in the United States.
Get a list of 807,527 websites using Win32 Header which includes location information, hosting data, contact details, 51,918 currently live websites and an additional 16,109 domains that redirect to sites in this list. 755,609 sites that used this technology previouslyand 18,867 websites in the United States currently using Win32 Header.
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