Twilio: Programmable SMS experienced elevated 21612 errors
Timeline of updates
- resolved
Programmable SMS experienced elevated SMS 21612 errors, where our internal number lookup failed for specific phone numbers in the US and Canada, causing Twilio not to send text messages. This incident lasted from 4:00am PST to 10:24am PST but has been resolved and we have fully recovered.
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 2019-11-12 18:48 UTC, resolved after 0 min, 1 update(s).
- Title
- Programmable SMS experienced elevated 21612 errors
- Vendor
- Twilio
- Date
- URL
- https://rewindex.com/company/twilio/incidents/05gqjn7ywjrs
Twilio profileRecent Twilio incidentsAll outages on November 12, 2019Twilio in November 2019MarkdownJSON