Outage in Fly.io
IPv6 Networking Issues in DFW
Resolved MajorIncident Report
Summary AI Generated
Fly.io's Dallas (DFW) region experienced IPv6 connectivity disruptions for approximately 6 hours on September 23, 2026, affecting inbound and outbound traffic on a subset of hosts while IPv4 remained unaffected. The root cause was maintenance performed by an upstream internet transit provider, which ran longer than the initially expected 10:00 AM UTC completion window. The incident was fully resolved by 12:15 PM UTC.
We are investigating IPv6 connectivity issues on a subset of hosts in DFW region. Machines on impacted hosts may see inbound/outbound connectivity issues over IPv6. IPv4 connectivity is not impacted.
Components affected
Fly.io DFW - Dallas, Texas (US)Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 2 hours ago - at 09/23/2026 12:15PM
This incident has been resolved.
IDENTIFIED
about 3 hours ago - at 09/23/2026 10:52AM
We are continuing to work on a fix for this issue.
IDENTIFIED
about 7 hours ago - at 09/23/2026 06:52AM
One of the internet transit providers upstream of the affected hosts is performing regional maintenance, which is expected to complete at 10:00AM UTC. IPv6 connectivity to and from destinations using that transit may be impacted during this time window.
INVESTIGATING
about 8 hours ago - at 09/23/2026 06:18AM
We are investigating IPv6 connectivity issues on a subset of hosts in DFW region. Machines on impacted hosts may see inbound/outbound connectivity issues over IPv6. IPv4 connectivity is not impacted.
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