# WorkOS: Radar SMS challenge failures for phone numbers in mainland China (+86)

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-10-15 17:17 UTC · Resolved: 2026-10-15 21:51 UTC · Duration: 4.6 h
- Updates: 3 · Affected components: AuthKit, Core Services - AuthKit, Dashboard, Supporting Services - Dashboard
- [Vendor status page: https://stspg.io/v5416ngwjz8m](https://stspg.io/v5416ngwjz8m)
- [Company: WorkOS](https://rewindex.com/company/workos.md)

## Summary

WorkOS reported a major Radar SMS challenge outage for mainland China (+86), preventing affected users from receiving codes or completing verification. It started at 2026-10-15 17:17 UTC and was resolved at 2026-10-15 21:51 UTC, lasting 4 h 34 min; WorkOS reported recovery after its upstream provider enabled alternate delivery routes. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-10-15 17:17 UTC: We are investigating an issue affecting Radar SMS challenge verification for phone numbers in mainland China (+86). Affected users may not receive verification codes or may encounter an error when requesting one, preventing them from completing verification. We will provide an update as more information becomes available.
- **monitoring** 2026-10-15 17:55 UTC: We are seeing some recovery after our upstream provider has enabled alternate delivery routes. We are continuing to monitor.
- **resolved** 2026-10-15 21:51 UTC: We've resolved the issue with Radar SMS challenge verifications to China.

## Rewindex changes for this incident

- 2026-10-15 17:17 UTC: [Major incident: Radar SMS challenge failures for phone numbers in mainland China (+86)](https://rewindex.com/change/i6a11e2ac1a6b30.md)


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Canonical: https://rewindex.com/company/workos/incidents/1xbhqjnc7368 · Markdown: https://rewindex.com/company/workos/incidents/1xbhqjnc7368.md · JSON: https://rewindex.com/api/v1/companies/workos/incidents/1xbhqjnc7368 · Generated 2026-10-18T11:29:16.191Z