Let s Encrypt lencr.org Last updated: Nov 30, 2021 See all Documentation What's lencr org lencr org is a domain name owned by Lets Encrypt: We use it to host data that is referenced inside the certificates we issue_ Why is my computer fetching this data? Is it malicious? No, the data on lencr org is never malicious_ When a device connects to lencr.org it's because client software on that device (like a web browser or an app) connected to another site, saw Let's Encrypt certificate, and is trying to verify that its valid. This is routine for many clients_ We can't speak to whether the other site being connected to is malicious If you're investigating network activity that seems unusual, then you may want to focus on the connection that started just before the connection to lencr org The pattern of clients' connections to lencr org