Let’s Encrypt: 6-day and IP address certificates are generally available

On Jan 15, 2026, Let’s Encrypt announced that both 6-day certificates and IP address certificates are now generally available. They say that short-lived certificates improve security by reducing reliance on unreliable revocation mechanisms.

For normal DNS name certificates, the shorter lifetime is opt-in and Let’s Encrypt has no plans on making it the default. The IP address certificates, however, do require the shorter lifetime.

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• Jan 2026: Let’s Encrypt blog post announcing that 6-day and IP address certificates are generally available
• Jul 2025: Let’s Encrypt blog post announcing that they have issued their first IP address certificate
• Feb 2025: Let’s Encrypt blog post announcing that they have issued their first 6-day certificate