Changes / Fly.io / IPv6 Networking Issues in DFW
Fly.io: Major incident: IPv6 Networking Issues in DFW
Summary
Fly.io reported a major IPv6 connectivity incident affecting a subset of hosts in DFW, starting 2026-09-23 06:18 UTC and resolved at 2026-09-23 12:15 UTC, lasting 5 h 57 min. Machines on affected hosts could experience inbound/outbound IPv6 issues; IPv4 was unaffected. Fly.io identified regional maintenance by an upstream internet transit provider.
Machine-written from the diff below (Sol; type: incident degradation). Check the diff before relying on it.
Major incidentLabel: degradation (model (Jev), 51%)Changed Detected Source: status.flyio.net (opens in new tab)
What changed
Before: not present
After: IPv6 Networking Issues in DFW
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2026-09-23 06:18 UTC
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After: 2026-09-23 12:15 UTC
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After: 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.
Before: not present
After: 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.
Before: not present
After: We are continuing to work on a fix for this issue.
Before: not present
After: This incident has been resolved.
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: IPv6 Networking Issues in DFW (this change) Fly.io reported a major IPv6 connectivity incident affecting a subset of hosts in DFW, starting 2026-09-23 06:18 UTC and resolved at 2026-09-23 12:15 UTC, lasting 5 h 57 min. Machines on affected hosts could experience inbound/outbound IPv6 issues; IPv4 was unaffected. Fly.io identified regional maintenance by an upstream internet transit provider. | Major incident |