&gt; <i>does LE do something like publishing a list of all of the domains for which they have issued certs?</i><p>Yes, they do, using certificate transparency logs. You can view all issued certs here: <a href="https:&#x2F;&#x2F;crt.sh&#x2F;?Identity=%25&amp;iCAID=7395" rel="nofollow">https:&#x2F;&#x2F;crt.sh&#x2F;?Identity=%25&amp;iCAID=7395</a>