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Vapi: SIP US Maintenance

MaintenancemaintenanceStatus: resolvedStarted Resolved (10 min)3 updates

Affected components: Vapi SIPVapi Numbers InboundVapi Numbers OutboundSIP InboundSIP Outbound

Timeline of updates

  1. update

    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.

  2. update

    Maintenance ended

  3. update

    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.

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Cite this

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

Title
SIP US Maintenance
Vendor
Vapi
Date
URL
https://rewindex.com/company/vapi/incidents/1064531

Vapi profileRecent Vapi incidentsAll outages on September 21, 2026Vapi in September 2026MarkdownJSON