# Vapi: SIP US Maintenance

> Vapi maintenance “SIP US Maintenance” on 2026-09-21: impact maintenance (vendor’s label), 10 min, 3 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/vapi/incidents/1064531
Last updated: 2026-09-21T06:12:21Z

- Impact (vendor’s label): maintenance (maintenance)
- Status: resolved
- Started: 2026-09-21 05:00 UTC · Resolved: 2026-09-21 05:10 UTC · Duration: 10 min
- Updates: 3 · Affected components: Vapi SIP, Vapi Numbers Inbound, Vapi Numbers Outbound, SIP Inbound, SIP Outbound
- Vendor status page: n/a
- [Company: Vapi](https://rewindex.com/company/vapi.md)

## Timeline of updates

- **update** 2026-09-21 05:00 UTC: We are performing maintenance on our SIP infrastructure to improve monitoring and stability. This will result in ~1min downtime. Who is affected: Calls using Vapi numbers, SIP (sip.vapi.ai), or a BYO SIP trunk will be unable to connect during the maintenance. Who is not affected: Calls using a native Twilio, Telnyx, or Vonage number connected directly, web callers, or users in the Vapi EU or AUS regions. When: September 20, 2026, 10:00pm to 10:10pm PT What to expect: SIP calls will fail to connect for about 1 minute at 10:00pm PT and return the standard error response. We will then validate for the rest of the window while calls connect normally. Action needed: If one minute of failed calls is a concern, route through an alternate transport such as Twilio for the window. We will update this page when calls are connecting again and when the work is complete.
- **update** 2026-09-21 05:10 UTC: Maintenance ended
- **update** 2026-09-21 06:12 UTC: Due to operational delays, the maintenance occurred at 10:50pm PT. We observed a decrease in the rate of outbound dials that returned to normal levels at 10:58pm PT. No on-going calls would have been impacted.

## Cite this

Maintenance posted by Vapi, started 2026-09-21 05:00 UTC, resolved after 10 min, 3 update(s).

- Canonical URL: https://rewindex.com/company/vapi/incidents/1064531
- Citation: Vapi, “SIP US Maintenance” (2026-09-21 05:00 UTC). Archived by Rewindex: https://rewindex.com/company/vapi/incidents/1064531 (CC BY 4.0).
- Markdown link: `[Vapi: SIP US Maintenance (2026-09-21)](https://rewindex.com/company/vapi/incidents/1064531)`


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Canonical: https://rewindex.com/company/vapi/incidents/1064531 · Markdown: https://rewindex.com/company/vapi/incidents/1064531.md · JSON: https://rewindex.com/api/v1/companies/vapi/incidents/1064531 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:29:21.914Z