503RADARINCIDENT ARCHIVEMETHODOLOGY
RESOLVED

Twilio outage — September 4, 2026

Voice Call Failures from a Subset of Twilio Toll-Free, Landline, and Mobile Phone Numbers to Multiple Networks in Multiple Countries

Twilio’s Voice was disrupted for 4h 44m on September 4, 2026.

Key facts

DetectedSeptember 4, 2026 · 20:55 UTC
Confirmed20:55 UTC
Resolved01:39 UTC
Duration4h 44m
ServiceVoice
Official recordhttps://stspg.io/8dmk6mw2yw7k

Timeline

  1. 20:55Z

    Detected · Official

    Reported directly on TWILIO's official status page — no earlier independent (crowd / dependency / measurement) signal.
  2. 01:39Z

    Resolved

    Signal volume fell back below the threshold; the event was closed.

Evidence

Official status feeddegraded (changed 20:55 UTC)
Anomaly score+0.00σ above this cell's own baseline
Engine confidence95%

Outage-related signals per hour over the live window, oldest → newest (peak 1).

How this was detected

Confirmed by TWILIO's official status page — no independent (crowd / dependency / measurement) corroboration.