Incidentsby GlyphSubset 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
548 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 historySMS Delivery Receipt Delays from Twilio to Bouygues Telecom Francestill openSMS Delivery Failures from Germany to a Subset of Twilio Long Codesstill openSMS Delivery Failures from Twilio to ETL Laosstill openSMS Delivery Failures from Twilio to MTN Nigerialasted 6h 1mSilent Network Authentication (SNA) Failure Increase and Gateway API (Lookup API) Failure Increase on EnStream in Canadalasted 14h 13mSMS Delivery Receipt Delays from Twilio to Globe Philippineslasted 13h 17m