Duo Security experienced a minor incident on July 31, 2025 affecting Phone Call Delivery and Phone Call Delivery and 1 more component, lasting 11h 46m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 31, 2025, 12:04 PM UTC
We are currently investigating an issue causing phone call authentication failures in India on all of our deployments and are working to correct the issue as soon as possible. Please check back here or subscribe to updates for any changes.
- identified Jul 31, 2025, 06:27 PM UTC
We have identified the cause of the VoIP authentication failures in India and are working on a solution. In the meantime, a workaround has been applied and we are seeing increased success rates. Please check back here or subscribe to updates for any changes.
- monitoring Jul 31, 2025, 09:49 PM UTC
We are now observing high rates of success of VoIP authentication in India. We will continue to monitor the authentications and post any updates if the situation changes or if the incident is considered fully resolved.
- resolved Jul 31, 2025, 11:50 PM UTC
The issue causing VoIP authentication failures in India is resolved and VoIP authentication services are functioning as expected.