# Sinch: [Scheduled] External Maintenance - AT&T- US

> Sinch maintenance “[Scheduled] External Maintenance - AT&T- US” on 2021-08-02: impact maintenance (vendor’s label), 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh
Last updated: 2021-08-02T15:53:00Z

- Impact (vendor’s label): maintenance (maintenance)
- Status: unknown
- Started: 2021-08-02 15:53 UTC · Resolved: not resolved · Duration: ongoing
- Updates: 1
- [Vendor status page: https://status.sinch.com/incidents/zxjnn8r8vpmh](https://status.sinch.com/incidents/zxjnn8r8vpmh)
- [Company: Sinch](https://rewindex.com/company/sinch.md)

## Timeline of updates

- **unknown** : Dear Client, We are writing to inform you that AT&T - US has postponed the maintenance listed below until further notice. Type: Scheduled Maintenance Start Time: 2021-08-03 00:00 UTC End Time: 2021-08-03 12:00 UTC Impact MT: Clients may experience delayed/rejected/failed Short Code SMS and MMS MT traffic towards AT&T Impact MO: Clients may experience delayed/rejected/failed Short Code SMS and MMS MO traffic from AT&T Impact DLR: Clients may experience delayed/rejected/failed Short Code SMS and MMS DLR traffic from AT&T Please contact support@sinch.com should you require further information or assistance.

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

## Cite this

Maintenance posted by Sinch, started 2021-08-02 15:53 UTC, not resolved, 1 update(s).

- Canonical URL: https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh
- Citation: Sinch, “[Scheduled] External Maintenance - AT&T- US” (2021-08-02 15:53 UTC). Archived by Rewindex: https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh (CC BY 4.0).
- Markdown link: `[Sinch: Scheduled External Maintenance - AT&T- US (2021-08-02)](https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh)`


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Canonical: https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh · Markdown: https://rewindex.com/company/sinch/incidents/zxjnn8r8vpmh.md · JSON: https://rewindex.com/api/v1/companies/sinch/incidents/zxjnn8r8vpmh · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T16:05:24.787Z