# Twilio: Intermittent 21604 Errors for Valid SMS Recipients

> Twilio status incident “Intermittent 21604 Errors for Valid SMS Recipients” on 2024-02-12: impact minor (vendor’s label), 16 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/twilio/incidents/4y912k05c5ws
Last updated: 2024-02-13T15:45:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2024-02-12 23:31 UTC · Resolved: 2024-02-13 15:45 UTC · Duration: 16 h
- Updates: 1
- [Vendor status page: https://status.twilio.com/incidents/4y912k05c5ws](https://status.twilio.com/incidents/4y912k05c5ws)
- [Company: Twilio](https://rewindex.com/company/twilio.md)

## Timeline of updates

- **resolved** 2024-02-13 15:45 UTC: Intermittent, 21604 errors for valid SMS recipients has been resolved and SMS is operating normally at this time.

_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 2024-02-12 23:31 UTC, resolved after 16 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/twilio/incidents/4y912k05c5ws
- Citation: Twilio, “Intermittent 21604 Errors for Valid SMS Recipients” (2024-02-12 23:31 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/incidents/4y912k05c5ws (CC BY 4.0).
- Markdown link: `[Twilio: Intermittent 21604 Errors for Valid SMS Recipients (2024-02-12)](https://rewindex.com/company/twilio/incidents/4y912k05c5ws)`


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Canonical: https://rewindex.com/company/twilio/incidents/4y912k05c5ws · Markdown: https://rewindex.com/company/twilio/incidents/4y912k05c5ws.md · JSON: https://rewindex.com/api/v1/companies/twilio/incidents/4y912k05c5ws · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T15:21:40.626Z