# Twilio: SMS Delivery Degradation Toward AT&T US (311-180) via A Subset of ShortCodes

> Twilio status incident “SMS Delivery Degradation Toward AT&T US (311-180) via A Subset of ShortCodes” on 2019-12-22: impact minor (vendor’s label), 5.3 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/twilio/incidents/9v5v2xy957xd
Last updated: 2019-12-22T08:47:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2019-12-22 03:29 UTC · Resolved: 2019-12-22 08:47 UTC · Duration: 5.3 h
- Updates: 1
- [Vendor status page: https://status.twilio.com/incidents/9v5v2xy957xd](https://status.twilio.com/incidents/9v5v2xy957xd)
- [Company: Twilio](https://rewindex.com/company/twilio.md)

## Timeline of updates

- **resolved** 2019-12-22 08:47 UTC: This incident has been resolved.

_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 2019-12-22 03:29 UTC, resolved after 5.3 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/twilio/incidents/9v5v2xy957xd
- Citation: Twilio, “SMS Delivery Degradation Toward AT&T US (311-180) via A Subset of ShortCodes” (2019-12-22 03:29 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/incidents/9v5v2xy957xd (CC BY 4.0).
- Markdown link: `[Twilio: SMS Delivery Degradation Toward AT&T US (311-180) via A Subset of ShortCodes (2019-12-22)](https://rewindex.com/company/twilio/incidents/9v5v2xy957xd)`


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Canonical: https://rewindex.com/company/twilio/incidents/9v5v2xy957xd · Markdown: https://rewindex.com/company/twilio/incidents/9v5v2xy957xd.md · JSON: https://rewindex.com/api/v1/companies/twilio/incidents/9v5v2xy957xd · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T16:47:32.545Z