Forces browsers to only communicate with the site using HTTPS.
https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security
SSL Certificates
Get access to data on 40,468,402 websites HSTS Customers. We know of 25,938,363 live websites using HSTS and an additional 14,530,039 sites that used HSTS historically and 3,896,369 websites in the United States.
Get a list of 40,468,402 websites using HSTS which includes location information, hosting data, contact details, 25,938,363 currently live websites and an additional 4,238,766 domains that redirect to sites in this list. 14,530,039 sites that used this technology previouslyand 3,896,369 websites in the United States currently using HSTS.
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