[Servercert-wg] List of Websites Relying on TLS 1.0 / 1.1

Wayne Thayer wthayer at mozilla.com
Mon Jul 1 08:54:12 MST 2019

Last year, Mozilla [1], Google [2], Microsoft [3], and Apple [4] all
announced that our browsers will stop supporting TLS 1.0 and 1.1 in March
2020. During the Mozilla browser update at the last two F2F meetings, I
have asked CAs to help get the word out to their customers about this
change. CAs have direct relationships with the organizations that operate
affected websites, and this provides a great opportunity for CAs to engage
with their customers and help to improve web security.

At the last meeting, I was asked if Mozilla could facilitate this outreach
by providing a list of websites that do not support TLS 1.2 or higher
grouped by the CA that issued the website's TLS certificate. This
information - for websites on the Tranco top 1 million list [5] - is
located at:


Please be aware that this information was collected 1-2 months ago, so I
recommend that you confirm that the site is still on the following list of
affected site, which is updated weekly:


Please let me know if you have any questions, and thanks in advance for
everyone's help with this!

- Wayne

[5] https://tranco-list.eu/
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