Twilio incident
SMS Delivery Receipt Delays From a Subset of Twilio Long Codes to Zong Pakistan
Twilio experienced a minor incident on July 2, 2026 affecting SMS, APAC, lasting 7h 57m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 02, 2026, 06:53 PM UTC
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Zong network subscribers in Pakistan. 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.
- identified Jul 02, 2026, 06:53 PM UTC
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Zong network subscribers in Pakistan. 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.
- identified Jul 02, 2026, 07:59 PM UTC
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Zong network subscribers in Pakistan. 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.
- monitoring Jul 02, 2026, 10:05 PM UTC
We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to Zong network subscribers in Pakistan and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
- monitoring Jul 03, 2026, 12:06 AM UTC
We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to Zong network subscribers in Pakistan and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.
- resolved Jul 03, 2026, 02:50 AM UTC
The incident has been resolved and SMS delivery receipts from a subset of Twilio Long Codes to Zong network subscribers in Pakistan are operating normally.