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Last updated: Dec 4, 2020 | See all Documentation

What’s lencr.org?

lencr.org is a domain owned by Let’s Encrypt. We use it to host OCSP, CRLs, and issuer certificates: all the URLs that show up in certificates.

We used to use longer URLs like http://ocsp.int-x3.letsencrypt.org/. However, when we issued our new root and intermediate certificates, we wanted to make them as small as possible. Every HTTPS connection on the web (billions per day) has to send a copy of a certificate, so every byte matters. We chose lencr.org because of its similarity with our name: Let’s ENCRypt. We pronounce it much like the fictional region of Lancre in Terry Pratchett’s Discworld novels.