Let's Encrypt incident

HA Datacenter 1 IPv6 Connectivity

Ongoing since 04:52 PM UTC, affecting acme-v02.api.letsencrypt.org (Production) and acme-v02.api.letsencrypt.org (Production) (acme-v02.api.letsencrypt.org (Production) — High Assurance Datacenter 1) and 1 more.

identified Nov 06, 2026, 05:17 PM UTC

We've identified the issue and are awaiting a fix from our upstream ISP.

Started: Nov 06, 2026, 04:52 PM UTC
Resolved: Ongoing
Duration: ● 1h 20m
Detected by Pingoru: Nov 06, 2026, 04:52 PM UTC

Affected components

acme-v02.api.letsencrypt.org (Production)acme-v02.api.letsencrypt.org (Production) (acme-v02.api.letsencrypt.org (Production) — High Assurance Datacenter 1)acme-staging-v02.api.letsencrypt.org (Staging)acme-staging-v02.api.letsencrypt.org (Staging) (acme-staging-v02.api.letsencrypt.org (Staging) — High Assurance Datacenter 1)

Update timeline

identified Nov 06, 2026, 04:52 PM UTC

Let's Encrypt is aware of an IPv6 connectivity issue from HA Datacenter 1. We are engaged in communication with our upstream provider. Production API traffic has been shifted to HA Datacenter 2 and is functioning as intended. Staging will be affected for the duration of the incident.
identified Nov 06, 2026, 05:17 PM UTC

We've identified the issue and are awaiting a fix from our upstream ISP.

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