Subset of Inbound Calls With Invalid ST/SH Passports Being Rejected
Dec 11, 20:49 UTCDec 11, 20:49 UTC
Duration
0m
Impact
Informational
Root cause
Bug
Twilio, 90 days
545 incidents
Affected
Not listed by the vendor.
Final update
From 2025-11-25 19:25 UTC until 2025-12-11 00:23 UTC, a small subset of inbound calls from carriers sending invalid STIR/SHAKEN PASSporTs were erroneously rejected. These calls should have been accepted and completed with a 32021 (warning), but due to a software bug they were instead classified as 32020 (error) and blocked. The issue has been mitigated and inbound calls with invalid PASSporTs are now processed normally.
Timeline
- Resolved · Dec 11, 20:49 UTC
From 2025-11-25 19:25 UTC until 2025-12-11 00:23 UTC, a small subset of inbound calls from carriers sending invalid STIR/SHAKEN PASSporTs were erroneously rejected. These calls should have been accepted and completed with a 32021 (warning), but due to a software bug they were instead classified as 32020 (error) and blocked. The issue has been mitigated and inbound calls with invalid PASSporTs are now processed normally.
More from Twilio
Full history| Started | Incident | Impact | Duration |
|---|---|---|---|
| Sep 2319:34 UTC | Voice Call Failures from a Subset of Twilio Mobile Numbers to United Kingdom | minor | Ongoing |
| Sep 2317:57 UTC | SMS Delivery Failures from Twilio Alphanumeric Sender IDs to MTN Nigeria | minor | 5h 54m |
| Sep 2315:02 UTC | Voice Call Failures from a Subset of Twilio Phone Numbers to Norway | minor | Ongoing |
| Sep 2312:53 UTC | SMS Delivery Delays from Twilio to MASS Response Austria | minor | 4h 20m |
| Sep 2310:58 UTC | SMS Delivery Failures from Twilio to Multiple Countries | minor | 9h 12m |
| Sep 2306:32 UTC | SMS Delivery Delays from Twilio Phone Numbers to Tele2 Sweden | minor | 5h 53m |
Also caused by software bug
All| Started | Vendor | Incident | Impact | Duration |
|---|---|---|---|---|
| Sep 1518:57 UTC |  ClickHouse | ClickPipes failing on Kinesis in AWS us-east-1ClickHouse | critical | 29h 46m |
| Aug 819:48 UTC |  Grafana Labs | Alerting expressions pipeline failing when recovery settingsGrafana Labs | minor | 0m |
| Aug 615:22 UTC |  GitHub | Incident with ActionsGitHub | critical | 10h 42m |
| Jul 2314:14 UTC |  Box | [Medium] Issues with Box HubsBox | major | 16m |
| Jun 1719:00 UTC | GitHub | Incident With WebhooksGitHub | none | 0m |
| May 2801:13 UTC | GitHub | Webhook APIs and UI DegradedGitHub | minor | 19m |
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