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May 13, 2026 1:25PM UTC Scheduled - During the maintenance window, customers may experience temporary non-fulfillment of requests related to: Creating, updating, or deleting zones (primary/secondary) Managing zone records via API and UI A propagation delay of approximately 10 minutes may also be observed. There is no impact on domain resolution services. May 31, 2026 4:30AM UTC Active - Scheduled maintenance is starting. May 31, 2026 10:30AM UTC Completed - Scheduled maintenance is complete.

April 14, 2026 12:39PM UTC Scheduled - We will be performing a regular maintenance on May 3, 2026, from 4:00 AM UTC to 8:00 AM UTC. For a few minutes within the maintenance window, the UltraDNS Managed Services Portal (https://portal.ultradns.com/) and the REST API (https://api.ultradns.com/) transactions may encounter an error and need to be attempted again. In addition, Site Backer, Traffic Controller failover events and Primary domain propagation may be delayed for a few minutes during the maintenance period. There will not be any impact to DNS resolution, as existing data will continue to resolve throughout. May 3, 2026 4:00AM UTC Active - Scheduled maintenance is starting. May 3, 2026 8:00AM UTC Completed - Scheduled maintenance is complete.

April 15, 2026 8:04AM UTC Investigating - We are experiencing a DDoS against nameservers in parts of Asia and Australia. Customers may see timeouts in these regions. Our teams are actively engaged in mitigating efforts. Further updates will be provided as progress continues. April 15, 2026 8:28AM UTC Identified - Our teams are working on mitigating the attack on our nameservers in parts of Asia and Australia. Customers may see timeouts in these regions. Will provide further updates as progress continues. April 15, 2026 9:08AM UTC Identified - Our teams have been able to mitigate a large portion of the attack and our nameservers have started to recover. Customers may still see timeouts in these regions as we work on fine tuning the mitigation and will provide further updates as progress continues. April 15, 2026 9:33AM UTC Identified - Our teams are continuing to fine tune countermeasures in order to mitigate impact on our nameservers. Will provide further updates as progress continues. April 15, 2026 9:59AM UTC Identified - Our teams are continuing to fine tune countermeasures in order to mitigate impact on our nameservers. Will provide further updates as progress continues. April 15, 2026 10:44AM UTC Identified - Our teams are continuing to fine tune countermeasures in order to mitigate impact on our nameservers and we are seeing improvement. Will provide further updates as progress continues. April 15, 2026 11:16AM UTC Resolved - Our teams have updated countermeasures to mitigate the attack and this should be resolved at this time.

April 4, 2026 1:15PM UTC Investigating - We are experiencing a DDoS against nameservers in parts of Asia and parts of Europe. Customers may see timeouts in these regions. Our teams are actively engaged in mitigating efforts. Further updates will be provided as progress continues. April 4, 2026 1:50PM UTC Identified - Our teams have been able to mitigate the attack and our nameservers have recovered in Europe and parts of Asia. The only remaining region still impacted is Singapore. We are still working on fine tuning the mitigation and will provide further updates as progress continues. April 4, 2026 2:30PM UTC Identified - Our teams are continuing to fine tune countermeasures in order to mitigate impact on last remaining region in Singapore. Will provide further updates as progress continues April 4, 2026 2:49PM UTC Monitoring - Countermeasures have been updated for the Singapore area and services should be returning to normal at this time. We are continuing to monitor. April 4, 2026 3:12PM UTC Resolved - Our engineers have updated countermeasures and this should be resolved at this time.

February 11, 2026 8:31PM UTC Scheduled - We will be performing a planned maintenance on March 01, 2026, from 5 AM UTC to 1 PM UTC. For a few minutes within the maintenance window, the UltraDNS Managed Services Portal (https://portal.ultradns.com/) and the REST API (https://api.ultradns.com/) transactions may encounter an error and need to be attempted again. In addition, Site Backer, Traffic Controller failover events and Primary domain propagation may be delayed for a few minutes during the maintenance period. There will not be any impact to DNS resolution, as existing data will continue to resolve throughout. March 1, 2026 5:00AM UTC Active - Scheduled maintenance is starting. March 1, 2026 1:00PM UTC Completed - Scheduled maintenance is complete.

February 2, 2026 10:49AM UTC Investigating - Start Time: 6:06 GMT We are seeing increased latency and error rates regionally and working to resolve issues. February 2, 2026 11:25AM UTC Investigating - We are still working to resolve the issue. Some customers may continue to experience intermittent latency and error rates in select regions. Our teams remain actively engaged and are continuing mitigation efforts. Further updates will be provided as progress continues. February 2, 2026 12:06PM UTC Identified - We have identified the issue and are working on remediation. Some customers may continue to experience intermittent latency and error rates in select regions while this work is ongoing. Our teams remain actively engaged and will continue to provide updates as progress continues. February 2, 2026 12:42PM UTC Identified - Our teams are continuing the work on resolving the identified issue with urgency. Some customers may continue to experience intermittent latency and error rates in select regions while this work is ongoing. Our teams remain actively engaged and will continue to provide updates as progress continues. February 2, 2026 1:17PM UTC Identified - Our teams are actively working to resolve the identified issue as quickly as possible. During this time, some customers might still experience occasional latency and error rates in certain regions. We will keep you informed with updates as we make progress. February 2, 2026 1:55PM UTC Identified - Our teams are actively working to resolve the identified issue as quickly as possible. During this time, some customers might still experience occasional latency and error rates in certain regions. We will keep you informed with updates as we make progress. February 2, 2026 2:47PM UTC Identified - Our teams are actively working to resolve the identified issue as quickly as possible. During this time, some customers might still experience occasional latency and error rates in certain regions. We will keep you informed with updates as we make progress. February 2, 2026 3:05PM UTC Identified - We are now rolling out a fix for the identified issue. Some customers may continue to experience intermittent latency and error rates in select regions while deployment is in progress. We will continue to provide updates as rollout progresses. February 2, 2026 3:52PM UTC Identified - Our teams are continuing to rolling out a fix for the identified issue. Some customers may continue to experience intermittent latency and error rates in select regions while deployment is in progress. We will continue to provide updates as rollout progresses. February 2, 2026 4:35PM UTC Identified - Our teams are continuing to rolling out a fix for the identified issue. Some customers may continue to experience intermittent latency and error rates in select regions while deployment is in progress. We will continue to provide updates as rollout progresses. February 2, 2026 5:07PM UTC Identified - Our teams are continuing to roll out a fix for the identified issue, with deployment progressing across the environment and impact becoming more limited. Some customers may continue to experience intermittent latency and error rates in select regions while this work is ongoing. We will continue to provide updates as rollout progresses. February 2, 2026 5:42PM UTC Identified - Our teams are continuing to roll out a fix for the identified issue, with deployment progressing across the environment and impact becoming more limited. Some customers may continue to experience intermittent latency and error rates in select regions while this work is ongoing. We will continue to provide updates as rollout progresses. February 2, 2026 6:54PM UTC Monitoring - We are no longer observing service degradation and are continuing to monitor closely for any recurrence. Update deployment is still in progress across all locations, and we will provide additional updates as rollout continues. February 2, 2026 7:00PM UTC Monitoring - We are no longer observing service degradation and are continuing to monitor closely for any recurrence. Update deployment is still in progress across all locations, and we will provide additional updates as rollout continues. February 2, 2026 8:01PM UTC Monitoring - We are no longer observing service degradation and are continuing to monitor closely for any recurrence. Update deployment is still in progress across all locations, and we will provide additional updates as rollout continues. February 2, 2026 9:34PM UTC Resolved - The identified impact has been mitigated, and remediation actions have been applied. Our teams are continuing to monitor the environment closely to ensure stability.

February 1, 2026 11:06AM UTC Scheduled - This is a continuation of the planned maintenance on February 01, 2026. For a few minutes within the maintenance window, the UltraDNS Managed Services Portal (https://portal.ultradns.com/) and the REST API (https://api.ultradns.com/) transactions may encounter an error and need to be attempted again. In addition, SiteBacker, Traffic Controller failover events and primary domain propagation may be delayed for a few minutes during the maintenance period. There will not be any impact to DNS resolution, as existing data will continue to resolve throughout. February 1, 2026 11:11AM UTC Completed - Scheduled maintenance is complete.

January 15, 2026 5:56PM UTC Scheduled - We will be performing a planned maintenance on February 01, 2026. For a few minutes within the maintenance window, the UltraDNS Managed Services Portal (https://portal.ultradns.com/) and the REST API (https://api.ultradns.com/) transactions may encounter an error and need to be attempted again. In addition, SiteBacker, Traffic Controller failover events and primary domain propagation may be delayed for a few minutes during the maintenance period. There will not be any impact to DNS resolution, as existing data will continue to resolve throughout. February 1, 2026 5:00AM UTC Active - Scheduled maintenance is starting. February 1, 2026 11:00AM UTC Completed - Scheduled maintenance is complete.

January 8, 2026 4:18PM UTC Scheduled - We will be adding new IP addresses to the US Central pool of SiteBacker testing locations. These are expected to be active as soon as January 21, 2026. Please whitelist these IP's if they are monitoring endpoints that may block external IP's. 156.154.96.153 156.154.96.154 2610:a1:306c:128::153 2610:a1:306c:128::154 Where can I find the full set of source IP's? https://ultra-portalstatic.ultradns.com/static/console/docs/Traffic_Management_IPs_for_Probing.html has all current monitoring IP's and will be updated in near future to include the new source IP's. Which products does this apply to? SiteBacker, Traffic Controller, Simple Monitor/Failover, Simple Load Balancing. If you do not use any of these products, this notice is not relevant to you. Do these new IP's need to be whitelisted? It depends on your environment. If your monitored endpoints are open to the Internet, whitelisting is not required. If you block some external IP's from accessing your monitored endpoints, you may need to add these IP's to your existing whitelist. What happens if these IP's are not whitelisted and are blocked by your side? It's possible there will be false alarms on your monitored pools and that US Central region will be considered failed for a probe. Please note that typically you need more than one region in failure for a failover to backup records to occur. January 21, 2026 12:00AM UTC Active - Scheduled maintenance is starting. January 21, 2026 6:00AM UTC Completed - Scheduled maintenance is complete.

January 16, 2026 10:42AM UTC Investigating - UltraDNS is currently seeing intermittent SAML login failures. We are currently investigating this issue and will provide further updates as soon as we have them January 16, 2026 11:08AM UTC Resolved - The SAML login issue has now been resolved.