# Twilio: SMS Delivery Failures to Zain Network Saudi Arabia (420-04)

> Twilio status incident “SMS Delivery Failures to Zain Network Saudi Arabia (420-04)” on 2021-05-20: impact minor (vendor’s label), 2.2 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/twilio/incidents/c9445b9vc7vq
Last updated: 2021-05-21T01:02:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2021-05-20 22:52 UTC · Resolved: 2021-05-21 01:02 UTC · Duration: 2.2 h
- Updates: 1
- [Vendor status page: https://status.twilio.com/incidents/c9445b9vc7vq](https://status.twilio.com/incidents/c9445b9vc7vq)
- [Company: Twilio](https://rewindex.com/company/twilio.md)

## Timeline of updates

- **resolved** 2021-05-21 01:02 UTC: We have fully investigated the issue of SMS failures to Zain Network Saudi Arabia (420-04) and it was determined that the impact was limited to a small set of customers. We will work directly with those customers to address any concerns. All systems are operational.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by Twilio, started 2021-05-20 22:52 UTC, resolved after 2.2 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/twilio/incidents/c9445b9vc7vq
- Citation: Twilio, “SMS Delivery Failures to Zain Network Saudi Arabia (420-04)” (2021-05-20 22:52 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/incidents/c9445b9vc7vq (CC BY 4.0).
- Markdown link: `[Twilio: SMS Delivery Failures to Zain Network Saudi Arabia (420-04) (2021-05-20)](https://rewindex.com/company/twilio/incidents/c9445b9vc7vq)`


---
Canonical: https://rewindex.com/company/twilio/incidents/c9445b9vc7vq · Markdown: https://rewindex.com/company/twilio/incidents/c9445b9vc7vq.md · JSON: https://rewindex.com/api/v1/companies/twilio/incidents/c9445b9vc7vq · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T17:10:52.539Z