Twilio Is Down
status.twilio.com
status.twilio.com
For Twilio accounts, there is an option to add a TOTP secret, and use it when logging in. But, they don't support disabling the default SMS method, and using TOTP exclusively. When you authenticate using TOTP, you still have a fallback option to receive a SMS code.
So, in the case of Twilio, the TOTP feature only improves convenience, not security. At least that was the case when I looked a couple months back. I opened a support ticket about this, and they acknowledged the problem, and that was it.
One thing that I find interesting about that, is that's -just- after the TCPA window opens in the EST time zone. The other reason that raises my brow is this status update...
> Twilio services are now operating normally, however processing of Programmable Messaging queues was delayed during the incident.
Emphasis mine.