Twilio incident
SMS Delivery Receipt Delays from Twilio to Chunghwa Telecom Taiwan
Twilio experienced a minor incident on September 16, 2026 affecting SMS, APAC, lasting 3h 24m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Sep 16, 2026, 06:57 PM UTC
Twilio customers may be experiencing SMS delivery delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
- investigating Sep 16, 2026, 07:10 PM UTC
Twilio customers may be experiencing SMS delivery receipt delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.
- identified Sep 16, 2026, 07:20 PM UTC
Twilio customers may be experiencing SMS delivery receipt delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.
- monitoring Sep 16, 2026, 08:22 PM UTC
We have observed a recovery in SMS delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
- resolved Sep 16, 2026, 10:22 PM UTC
The incident has been resolved and SMS delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan are operating normally.