Outage in Heroku

Issue with DNS for New Apps and Domains

Resolved Minor
September 16, 2025 - Started 27 days ago - Lasted about 19 hours
Official incident page

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Outage Details

The upstream DNS issue impacting Heroku has been resolved. Customers should no longer see errors, though some may continue to experience degraded performance as services stabilize.

We are actively monitoring the situation to ensure full reliability and will provide further updates as needed.
Components affected
Heroku Apps
Latest Updates ( sorted recent to last )
UPDATE 26 days ago - at 09/17/2025 09:10AM

The upstream DNS issue impacting Heroku has been resolved. Customers should no longer see errors, though some may continue to experience degraded performance as services stabilize.

We are actively monitoring the situation to ensure full reliability and will provide further updates as needed.

UPDATE 26 days ago - at 09/17/2025 07:10AM

Heroku is actively tracking an incident with our upstream DNS provider. We are working closely with the vendor to apply a fix, and restoration of services is underway in a staggered manner.

Recovery procedures have begun, and customers should see gradual resolution over the next 6–7 hours as updates are rolled out across our managed DNS network.

We will continue to provide updates as additional information becomes available.

UPDATE 26 days ago - at 09/17/2025 03:16AM

Heroku continues to track an incident with our upstream DNS provider. We are working with our vendor to implement the fix, and services are being restored in a staggered manner. Customers will begin to see resolution over the next 4 - 5 hours as we roll out the changes across our managed DNS network. We expect that the issue will be fully resolved by 08:30 UTC. We will provide an update at that time or sooner if additional information becomes available.

UPDATE 26 days ago - at 09/17/2025 12:54AM

Heroku continues to track an incident with our upstream DNS provider.

The impact to the Heroku experience is when customers create new apps or new domains on an existing app, the new hostname will not yet be accessible. Once the incident is resolved any apps or domains that have been created will become accessible.

We are working with our vendor to implement a phased solution to mitigate the issue. This is expected to take a few hours to complete. We will provide an update once the solution has been fully implemented or sooner if additional information becomes available.

UPDATE 26 days ago - at 09/17/2025 12:27AM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 11:31PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 10:34PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 09:38PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 08:45PM

Engineers identified an additional issue with DNS lookup errors for clients connecting from EU region. This impact has been mitigated by the upstream DNS provider.

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 07:53PM

Engineers are investigating new reports of DNS errors for existing apps and domains in the EU region, which are suspected to be related to this incident.

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 26 days ago - at 09/16/2025 07:41PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records. Next update will be made in one hour, or sooner if the situation changes.

UPDATE 26 days ago - at 09/16/2025 06:42PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records. Next update will be made in one hour, or sooner if the situation changes.

UPDATE 27 days ago - at 09/16/2025 06:15PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 27 days ago - at 09/16/2025 05:47PM

Heroku continues to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 27 days ago - at 09/16/2025 05:18PM

Engineers continue to track an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

UPDATE 27 days ago - at 09/16/2025 04:54PM

Engineers are tracking an incident with an upstream DNS provider which is causing delays in provisioning new apps and domains DNS records.

ISSUE 27 days ago - at 09/16/2025 04:23PM

Engineers have determined that an issue with Heroku's upstream DNS provider is causing delays in provisioning new apps and domains DNS records.

INVESTIGATING 27 days ago - at 09/16/2025 04:19PM

Engineers are investigating an issue, DNS names for new Heroku apps and domains are not reachable.

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