Fly.io outage: IPv6 Networking Issues in DFW

1. resolvedSep 23, 2026, 12:15 UTC

   This incident has been resolved.

2. identifiedSep 23, 2026, 10:52 UTC

   We are continuing to work on a fix for this issue.

3. identifiedSep 23, 2026, 06:52 UTC

   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.

4. investigatingSep 23, 2026, 06:18 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.

What APIStatus.watch saw

• Sep 23, 2026, 06:20 UTCoperational → degraded
• Sep 23, 2026, 12:20 UTCdegraded → operational
• Sep 23, 2026, 12:45 UTCoperational → degraded

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How often does Fly.io have incidents?

Fly.io reported 19 incidents in the last 90 days, 11 of them major or critical. A typical incident lasted 57 min. See Fly.io's uptime and incident history