# Sinch: Calling Degradation - US East

> Sinch status incident “Calling Degradation - US East” on 2021-12-07: impact minor (vendor’s label), 15 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c
Last updated: 2021-12-08T08:58:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2021-12-07 17:46 UTC · Resolved: 2021-12-08 08:58 UTC · Duration: 15 h
- Updates: 1
- [Vendor status page: https://status.sinch.com/incidents/n6wlspzc9r5c](https://status.sinch.com/incidents/n6wlspzc9r5c)
- [Company: Sinch](https://rewindex.com/company/sinch.md)

## Part of an outage event

- [AWS us-east-1 outage, Dec 7, 2021: 47 vendors, 59 incidents](https://rewindex.com/events/2021-12-07-aws-us-east-1)
- This incident depends on AWS (declared dependency, named as a cause before); it did not name AWS. (hop 1, posted +1 h 56 min vs the first vendor naming AWS)

```mermaid
flowchart LR
  root["AWS us-east-1<br/>own incident not archived"]:::inferred
  h1["Within an hour<br/>11 vendors, 9 blamed AWS<br/>Aptible, Firebolt, Honeycomb +8"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>16 vendors, 12 blamed AWS<br/>Maven Central, Pusher, Confluent +13"]:::blames
  root --> h4
  later["Later<br/>3 vendors, 2 blamed AWS<br/>Segment, Confluent, Doppler"]:::blames
  root --> later
  dr["Known dependency<br/>8 vendors<br/>Bandwidth, Sinch, Smartsheet +5"]:::hop2
  root -.->|"depends on AWS"| dr
  me["Sinch (this incident)<br/>posted +1 h 56 min"]:::me
  root -.->|"known dependency"| me
```

_Detected automatically from incidents that started together and named the same provider; a link means one incident named another vendor, not a confirmed cause._

## Timeline of updates

- **resolved** 2021-12-08 08:58 UTC: Dear Client, We are writing to inform you that this incident is now resolved. Incident start time: 2021-12-07 17:10 UTC Incident end time: 2021-12-08 00:30 UTC This issue was caused due to degradation on our cloud hosting providers platform. If you have any further questions or concerns please do not hesitate to reach out to support@sinch.com Sincerely, Sinch

_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 Sinch, started 2021-12-07 17:46 UTC, resolved after 15 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c
- Citation: Sinch, “Calling Degradation - US East” (2021-12-07 17:46 UTC). Archived by Rewindex: https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c (CC BY 4.0).
- Markdown link: `[Sinch: Calling Degradation - US East (2021-12-07)](https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c)`


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Canonical: https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c · Markdown: https://rewindex.com/company/sinch/incidents/n6wlspzc9r5c.md · JSON: https://rewindex.com/api/v1/companies/sinch/incidents/n6wlspzc9r5c · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T15:41:32.031Z