Outage in Zipwhip
SMS Delivery Delays and Delivery Receipt Delays from Twilio to Chunghwa Telecom Taiwan
Resolved MinorIncident Report
Summary AI Generated
Twilio experienced a 5.5-hour incident where SMS messages and delivery receipts sent to Chunghwa Telecom subscribers in Taiwan were delayed, though messages may have still been delivered. The cause was identified and addressed by the Twilio team. Service was fully restored and confirmed resolved on October 6, 2026.
Twilio customers may be experiencing SMS delivery delays and 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 1 hour or as soon as more information becomes available.
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Latest Updates ( sorted recent to last )
RESOLVED
about 9 hours ago - at 10/06/2026 03:02PM
The incident has been resolved and SMS delivery and delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan are operating normally.
MONITORING
about 11 hours ago - at 10/06/2026 01:16PM
We have observed a recovery in SMS delivery and delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.
MONITORING
about 13 hours ago - at 10/06/2026 11:13AM
We have observed a recovery in SMS delivery and 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.
IDENTIFIED
about 13 hours ago - at 10/06/2026 10:42AM
Twilio customers may be experiencing SMS delivery delays and 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 2 hours or as soon as more information becomes available.
IDENTIFIED
about 14 hours ago - at 10/06/2026 09:39AM
Twilio customers may be experiencing SMS delivery delays and 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.
INVESTIGATING
about 14 hours ago - at 10/06/2026 09:33AM
Twilio customers may be experiencing SMS delivery delays and 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 1 hour or as soon as more information becomes available.
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