# ngrok: Major incident: Getting a high rate of ERR_NGROK_503 in the EU region - No available reserved addresses

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2024-12-09 16:20 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/4n8fsv7ftb8m](https://stspg.io/4n8fsv7ftb8m)
- [Company: ngrok](https://rewindex.com/company/ngrok.md)
- Versions: before (none: first archived) → after incident\_version:670/q6z49nd3h59t@29201edfabd9
- Change 1 of 1 for this incident

Incident page (full timeline): [Getting a high rate of ERR\_NGROK\_503 in the EU region - No available reserved addresses](https://rewindex.com/company/ngrok/incidents/q6z49nd3h59t.md)
## What changed

**1. Added: Title**

```diff
+ Getting a high rate of ERR_NGROK_503 in the EU region - No available reserved addresses
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2024-12-09 16:20 UTC
```

**5. Added: Resolved time**

```diff
+ 2024-12-09 18:27 UTC
```

**6. Added: Affected components**

```diff
+ Agent Connectivity - Region - EU, Region - EU
```

**7. Added: Update** (investigating) · 2024-12-09 16:20 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (investigating) · 2024-12-09 16:21 UTC

```diff
+ We are continuing to investigate this issue.
```

**9. Added: Update** (identified) · 2024-12-09 16:52 UTC

```diff
+ We have identified the issue and are deploying a fix.
```

**10. Added: Update** (monitoring) · 2024-12-09 17:57 UTC

```diff
+ We have deployed the fix and are monitoring
```

**11. Added: Update** (monitoring) · 2024-12-09 17:57 UTC

```diff
+ We are continuing to monitor for any further issues.
```

**12. Added: Update** (resolved) · 2024-12-09 18:27 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2024-12-09 16:20 UTC | Major incident: Getting a high rate of ERR\_NGROK\_503 in the EU region - No available reserved addresses (this change) | major |

All ngrok changes: [timeline](https://rewindex.com/company/ngrok/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/icf6babc6962d19 · Markdown: https://rewindex.com/change/icf6babc6962d19.md · JSON: https://rewindex.com/api/v1/changes/icf6babc6962d19 · Generated 2026-10-20T00:48:36.176Z