Subdomain rate-limit status


How can I tell what the current limit is for a particular domain?

I’ve been gradually rolling out certs for multiple sub-domains (100+), and I’m wondering what the limit is right now (E.G how many certs can I create at this point in time, before hitting the 20 certs a week limit)?


There isn’t an official method but you can use this handy tool which works by scraping the certificate transparency logs at


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