Twilio: CNAME and a Record Conflict Bug Blocked DNS Validation
Timeline of updates
- resolved
Twilio DNS Validation was degraded for 2 days between 07/08/2025 and 07/10/2025. During this period of time customers may have experienced DNS validation wrongfully blocking requests or uploads for certs when using subdomains. Approximately 28 subdomains were blocked from requesting/uploading cert. The issue has now been resolved.
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).
Cite this
Status incident (vendor impact label: none) posted by Twilio, started 2025-07-11 20:06 UTC, resolved after 0 min, 1 update(s).
- Title
- CNAME and a Record Conflict Bug Blocked DNS Validation
- Vendor
- Twilio
- Date
- URL
- https://rewindex.com/company/twilio/incidents/k9czc0qmc8ty
Twilio profileRecent Twilio incidentsAll outages on July 11, 2025Twilio in July 2025MarkdownJSON