i know that you can preload your domain if you have everything with a valid HTTPS vertificate, but after preloading the domain if i go to subdomain.example.com is it going to me preload the same way as example.com is preloaded?


1 Answer 1


Yes. You can see at https://hstspreload.org/ that it is a requirement to include subdomains:

The includeSubDomains directive must be specified.

  • yea i saw that but i wasn't sure if the subdomains were preloaded too or it was just a requisite... thanks!! Commented May 30, 2019 at 4:01

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