Rewindex

CompaniesTwilioIncidents

Twilio: Voice Call Audio Quality Degradation Between Twilio Phone Numbers and Multiple Networks in United Kingdom

MinorStatus: resolvedStarted Resolved (4.6 h)1 updatestatus.twilio.com (opens in new tab)
Part of an outage event

GitHub outage, Jul 21, 2026 · 15 vendors, 19 incidents

Twilio’s incident started in the same window without naming GitHub (timing only, not evidence of a link). (timing only, posted −19 min vs GitHub’s own post)

Swipe sideways to see the whole diagram.

blamed Anthropicsame windowGitHubposted 10:31 UTCPosted before GitHub did1 vendor, 1 blamed GitHubSemaphoreWithin an hour2 vendors, 2 blamed GitHubHashiCorp, Terraform Cloud (HCP)Later1 vendor, 1 blamed GitHubMintlifyAnthropicposted −20 min, did not name GitHubBolt.new, Cursor−16 min to +7 h 14 minTwilio (this incident)posted −19 min
blamed Anthropicsame windowGitHubposted 10:31 UTCPosted before GitHub did1 vendor, 1 blamed GitHubSemaphoreWithin an hour2 vendors, 2 blamed GitHubHashiCorp, Terraform Cloud(HCP)Later1 vendor, 1 blamed GitHubMintlifyAnthropicposted −20 min, did not nameGitHubBolt.new, Cursor−16 min to +7 h 14 minTwilio (this incident)posted −19 min
Twilio is outlined in red. Groups show up to a few vendors each; the event page lists every incident.
Mermaid source
flowchart LR
  root["GitHub<br/>posted 10:31 UTC"]:::root
  before["Posted before GitHub did<br/>1 vendor, 1 blamed GitHub<br/>Semaphore"]:::blames
  root --> before
  h1["Within an hour<br/>2 vendors, 2 blamed GitHub<br/>HashiCorp, Terraform Cloud (HCP)"]:::blames
  root --> h1
  later["Later<br/>1 vendor, 1 blamed GitHub<br/>Mintlify"]:::blames
  root --> later
  p0["Anthropic<br/>posted −20 min, did not name GitHub"]:::timing
  root -.-> p0
  k0["Bolt.new, Cursor<br/>−16 min to +7 h 14 min"]:::hop2
  p0 -->|"blamed Anthropic"| k0
  me["Twilio (this incident)<br/>posted −19 min"]:::me
  root -.->|"same window"| me

Full event: timeline, evidence and all vendors →

Detected automatically from incidents that started together and named the same provider. A link means one vendor’s incident named another, not a confirmed cause.

Timeline of updates

  1. resolved

    We have observed a recovery in voice calls between Twilio Phone Numbers and network subscribers on multiple networks in the United Kingdom and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

From Twilio’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.

Archive proof

Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert.

How the archive is checked, and what it cannot prove.

This incident predates live tracking (October 17, 2026). It came from the vendor’s own published history, which is not covered by checkpoints.

Impact, status and times are the vendor’s own, as last archived. View on status.twilio.com (opens in new tab).

Twilio profileRecent Twilio incidentsMarkdownJSON