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    Last checked 9月8日 5:44 UTC

    Lets Encrypt status

    Nonprofit certificate authority providing free TLS certificates for websites.

    Experiencing an issue?

    Lets Encryptは落ちていますか？

    Maintenance

    The official status page for Lets Encrypt reports normal operation. 0 reports were recorded for Lets Encrypt in the last 24 hours. Last official check: 9月8日 5:44 UTC.

    Source: official status page

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    OverviewActivityHistoryCommunityAbout

    Lets Encrypt service health graph

    Service status and report activity over the last 24 hours, in 15-minute intervals. Early warnings and official incidents are shown separately.

    Lets Encrypt activity

    Loading reports… · Last 24 hours

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    by Uptimus
    ————Now
    • No problems detected
    • Possible problems
    • Problems detected
    • Early warning
    • Official incident

    Small green bars: normal status (illustrative). Taller bars: report activity.

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    Tap a bar to keep its details open. With the chart focused, use Left and Right to move between intervals, Home or End to jump, and Escape to close. Full data is available in the table below.

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    15-minute report intervals · UTC
    StartEndReportsStatus

    Latest activity

    Last 24 hours

    1. Official status checked

      Lets Encrypt has active maintenance

      Official provider status
      9月8日 5:44 UTC

    2. Official maintenance active

      Production Database Maintenance — September 2, 2026 20:07 UTC Scheduled - We will be performing production database maintenance. Clients may experience delays or errors during this period. September 2, 2026 20:30 UTC Active - We are beginning maintenance work on the production database. September 2, 2026 22:27 UTC Active - Maintenance is taking longer than anticipated and may extend beyond the scheduled window by up to an hour. September 2, 2026 23:28 UTC Completed - Maintenance is complete!

      Official provider status
      9月2日 23:28 UTC

    3. Official maintenance active

      Production Datacenter Maintenance — August 24, 2026 19:14 UTC Scheduled - We will be performing production database maintenance. Clients may experience delays or errors during this period as traffic is shifted around. August 24, 2026 19:56 UTC Active - Production database maintenance is beginning. August 24, 2026 20:30 UTC Completed - Production database maintenance has been completed. Happy issuance.

      Official provider status
      8月24日 20:30 UTC

    Lets Encrypt outage reports

    0 outage reports in the last 24 hours.

    最近の障害報告はありません

    過去24時間、このサービスに関する障害報告はコミュニティから送信されていません。

    Lets Encrypt のステータス変更を通知します

    メール、プッシュ、Webhookで通知します。

    監視を開始

    Lets Encrypt 障害マップ

    Approved reports from the last 24 hours, grouped by country. Markers show country-level locations, not precise locations or confirmed affected infrastructure.
    全マップを見る

    Lets Encrypt 障害マップ

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    Lets Encrypt status history

    Official status observations, not measured service uptime.

    Last 60 daysDaily history
    Loading history…
    ——
    • 正常
    • 問題
    • 障害
    • メンテナンス
    • データなし

    Lets Encrypt components

    Component nameStatus
    Lets Encrypt acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 1 statusUp
    Lets Encrypt acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 2 statusUp
    Lets Encrypt acme-staging-v02.api.letsencrypt.org (Staging) - High Assurance Datacenter 1 statusUp
    Lets Encrypt portal.letsencrypt.org (Production) - High Assurance Datacenter 1 statusUp
    Lets Encrypt portal.letsencrypt.org (Production) - High Assurance Datacenter 2 statusUp
    Lets Encrypt portal-staging.letsencrypt.org (Staging) - High Assurance Datacenter 1 statusUp
    Lets Encrypt *.c.lencr.org (Production) - Public Data Center statusUp
    Lets Encrypt stg-*.c.lencr.org (Staging) - Public Data Center statusUp
    Lets Encrypt Website - Public Data Center statusUp
    Lets Encrypt log.twig.ct.letsencrypt.org - Public Data Center statusUp

    Lets Encrypt incident history

    Official incidents, early warnings and community reports are identified separately. Early warning history covers only the last 24 hours. Dates use your time zone.

    View more history
    Incident nameDurationStartedUTCAcknowledgedSeverity
    Official status·Resolved0m2026年6月4日15:37 UTCYesMinor
    Official status·Resolved0m2026年5月13日20:32 UTCYesMajor
    Official status·Resolved0m2026年3月16日20:40 UTCYesMinor
    Official status·Resolved0m2026年3月4日23:03 UTCYesMaintenance
    Official status·Resolved0m2025年12月16日16:28 UTCYesMinor
    Official status·Resolved0m2025年12月10日20:54 UTCYesMaintenance
    Official status·Resolved0m2025年12月10日17:57 UTCYesMinor

    Scheduled maintenance

    Planned work published by the official provider.

    1. ✓

      Production Database Maintenance

      Maintenance

      September 2, 2026 20:07 UTC Scheduled - We will be performing production database maintenance. Clients may experience delays or errors during this period. September 2, 2026 20:30 UTC Active - We are beginning maintenance work on the production database. September 2, 2026 22:27 UTC Active - Maintenance is taking longer than anticipated and may extend beyond the scheduled window by up to an hour. September 2, 2026 23:28 UTC Completed - Maintenance is complete!

      Started 2026年9月2日 23:28 UTC · Ongoing

    2. ✓

      Production Datacenter Maintenance

      Maintenance

      August 24, 2026 19:14 UTC Scheduled - We will be performing production database maintenance. Clients may experience delays or errors during this period as traffic is shifted around. August 24, 2026 19:56 UTC Active - Production database maintenance is beginning. August 24, 2026 20:30 UTC Completed - Production database maintenance has been completed. Happy issuance.

      Started 2026年8月24日 20:30 UTC · Ongoing

    3. ✓

      Staging Maintenance

      Maintenance

    コミュニティディスカッション

    Lets Encryptについてのあなたの考えを共有してください

    A
    まだコメントはありません

    最初のコメントを残しましょう！

    Uptimus による Lets Encrypt の監視について

    Uptimus は公式ステータス情報から Lets Encrypt を監視し、障害、メンテナンス、コンポーネントの状態を共通のステータスに正規化します。

    このページには現在、12 件のコンポーネント、7 件の障害、10 件のメンテナンス、10 日分の履歴があります。

    Uptimus は独立したサービスで、Lets Encrypt とは提携していません。正常表示でも、すべての利用者、端末、地域に問題がないことを保証するものではありません。

    Uptimus による Lets Encrypt の監視方法

    Lets Encrypt または監視対象コンポーネントで重大な障害が報告されたときに通知します。 通知はメール、プッシュ、設定済み連携など、ワークスペースで有効なチャネルに配信できます。 利用可能な履歴には 7 件の障害があり、現在の状態を超えた背景を提供します。 最近記録された障害は「API Degraded Performance」です。

    性能低下、部分的な影響、全面停止ではない小規模な障害について通知します。 Uptimus は現在 Lets Encrypt の 12 コンポーネントを追跡しています: acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 1, acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 2, acme-staging-v02.api.letsencrypt.org (Staging) - High Assurance Datacenter 1, portal.letsencrypt.org (Production) - High Assurance Datacenter 1。 通知はメール、プッシュ、設定済み連携など、ワークスペースで有効なチャネルに配信できます。

    メンテナンス通知
    Lets Encrypt が予定済み、計画中、実施中のメンテナンスを公開したときに通知します。 Uptimus は利用可能な Lets Encrypt の履歴から 10 件のメンテナンスを記録しています。 通知はメール、プッシュ、設定済み連携など、ワークスペースで有効なチャネルに配信できます。
    復旧通知
    Lets Encrypt または影響を受けたコンポーネントが正常に戻ったときに通知します。 このページには 10 日分の履歴があり、解決済みイベントも確認できます。 通知はメール、プッシュ、設定済み連携など、ワークスペースで有効なチャネルに配信できます。
    ステータスメッセージ
    Uptimus は Lets Encrypt が公開した障害の見出しを正規化ステータスとともに保存します。 利用可能な履歴には 7 件の障害があり、現在の状態を超えた背景を提供します。 最近記録された障害は「API Degraded Performance」です。
    ステータス詳細
    障害とメンテナンスの更新を保存し、調査、対応、復旧の進行を確認できます。 Uptimus が保存した最近の公式更新:「June 3, 2026 16:05 UTC Identified - Let's Encrypt's production API is experiencing degraded performance. We've re-routed traffic from the affected datacenter. Clients may have sporadically encountered 404 and 500 error responses depending on the API call an…」。
    コンポーネントの絞り込み
    すべてのコンポーネント、または利用する Lets Encrypt 製品だけを選択できます。公式通知は選択を反映します。 Uptimus は現在 Lets Encrypt の 12 コンポーネントを追跡しています: acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 1, acme-v02.api.letsencrypt.org (Production) - High Assurance Datacenter 2, acme-staging-v02.api.letsencrypt.org (Staging) - High Assurance Datacenter 1, portal.letsencrypt.org (Production) - High Assurance Datacenter 1。 絞り込みは公式通知の配信対象だけを変更し、公開履歴からイベントを削除しません。

    よくある質問

    Lets Encrypt のステータス変更を通知します

    監視を開始
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    Lets Encrypt：Uptimus と Downdetector の比較

    Downdetector の公開ページは主にユーザー報告を中心としています。Uptimus は、提供元が公開する公式インシデント、メンテナンス、コンポーネント状態も組み合わせます。

    Lets Encrypt：Uptimus と Downdetector の比較
    比較基準UptimusDowndetector
    Lets Encrypt のコミュニティ障害報告

    July 28, 2026 23:10 UTC Scheduled - We're performing maintenance to our staging environment which may result in some ACME clients receiving timeouts for up to a 10 minute period. The production environment is not affected. July 28, 2026 23:10 UTC Active - We're performing maintenance to our staging environment which may result in some ACME clients receiving timeouts for up to a 10 minute period. The production environment is not affected. July 28, 2026 23:15 UTC Completed - Staging maintenance is complete.

    Started 2026年7月28日 23:15 UTC · Ongoing

  1. ✓

    API Database Maintenance

    Maintenance

    July 28, 2026 20:47 UTC Scheduled - We're performing database maintenance which may result in some ACME clients receiving timeouts for up to a 10 minute period. July 28, 2026 20:50 UTC Active - We're performing database maintenance which may result in some ACME clients receiving timeouts for up to a 10 minute period. July 28, 2026 20:52 UTC Completed - Database maintenance is complete.

    Started 2026年7月28日 20:52 UTC · Ongoing

  2. ✓

    Staging API Maintenance

    Maintenance

    July 23, 2026 01:36 UTC Scheduled - We're performing maintenance to our staging environment which may result in errors or timeouts during this window. Our production environment is not affected. July 23, 2026 01:39 UTC Active - Staging maintenance is in progress. July 23, 2026 02:02 UTC Completed - Staging maintenance is complete.

    Started 2026年7月23日 02:02 UTC · Ongoing

  3. ✓

    API Degraded Performance

    Maintenance

    June 18, 2026 16:04 UTC Investigating - Let's Encrypt's production API is experiencing degraded performance. Some clients may encounter 400 and 500 error responses. Most clients are still succeeding. June 18, 2026 16:35 UTC Investigating - We re-routed traffic to bring success rates back to normal after an upstream network event disrupted traffic between two datacenters. June 19, 2026 04:45 UTC Investigating - We're operating normally, but with reduced redundancy. We continue to work with our upstream ISP to identify and resolve the issue. July 2, 2026 18:05 UTC Identified - Starting shortly, we will be performing maintenance on networking equipment in High Assurance Datacenter 1. Some clients may experience errors while traffic shifting occurs. July 2, 2026 20:08 UTC Monitoring - July 2, 2026 22:18 UTC Investigating - We're receiving reports of increased timeouts to our API following a swap of our active datacenters. We are investigating and reverting that change. July 2, 2026 22:52 UTC Monitoring - API traffic has been swapped back between datacenters. July 2, 2026 23:15 UTC Monitoring - After monitoring we have confirmed our API is operational. July 3, 2026 01:20 UTC Investigating - We're noticing elevated 503s and slow responses. Investigating. July 3, 2026 01:32 UTC Monitoring - Elevated 503s and slow responses resolved, back to operational. July 23, 2026 01:39 UTC Resolved - All services remain operational, and we've now restored full internal redundancy.

    Started 2026年7月23日 01:39 UTC · Ongoing

  4. ✓

    Staging Database Maintenance

    Maintenance

    June 15, 2026 15:06 UTC Scheduled - We're performing staging database maintenance which may result in some ACME clients receiving timeouts for up to a 10 minute period. June 15, 2026 15:11 UTC Active - We are beginning maintenance on the staging databases. June 15, 2026 15:49 UTC Completed - This maintenance is complete.

    Started 2026年6月15日 15:49 UTC · Ongoing

  5. ✓

    Production Datacenter Maintenance

    Maintenance

    April 29, 2026 18:55 UTC Scheduled - We'll be performing routine maintenance in a High Assurance Datacenter 2. Some ACME clients may see elevated latencies. April 29, 2026 19:34 UTC Active - We are beginning maintenance in High Assurance Datacenter 2. April 29, 2026 22:10 UTC Completed - We have finished maintenance.

    Started 2026年4月29日 22:10 UTC · Ongoing

    6. 利用可能
    利用可能
    個別の報告と広範な障害を区別する適応型ベースライン利用可能利用可能
    24時間の報告推移と地域別障害マップ利用可能利用可能
    Webサイト、公式ステータス、Steam、Androidアプリとゲームを1つのワークスペースで管理利用可能別製品
    同じワークスペースからメール、プッシュ、Webhook通知利用可能別製品
    Lets Encrypt の公式インシデント更新とステータスタイムライン利用可能ユーザー報告中心
    コンポーネント状態とメンテナンスを分けて表示利用可能公開ページでは限定的
    利用可能ユーザー報告中心 · 公開ページでは限定的別製品

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