# Fly.io: IPv6 Networking Issues in DFW

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-09-23 06:18 UTC · Resolved: 2026-09-23 12:15 UTC · Duration: 6.0 h
- Updates: 4 · Affected components: DFW - Dallas, Texas (US)
- [Vendor status page: https://status.flyio.net/incidents/01M36HPZ86G87MQXEM9MA40BXN](https://status.flyio.net/incidents/01M36HPZ86G87MQXEM9MA40BXN)
- [Company: Fly.io](https://rewindex.com/company/fly-io.md)

## 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, sol)_
## Timeline of updates

- **investigating** 2026-09-23 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.
- **identified** 2026-09-23 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.
- **identified** 2026-09-23 10:52 UTC: We are continuing to work on a fix for this issue.
- **resolved** 2026-09-23 12:15 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-09-23 06:18 UTC: [Major incident: IPv6 Networking Issues in DFW](https://rewindex.com/change/i6b11a1a4f8781e.md)


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Canonical: https://rewindex.com/company/fly-io/incidents/01M36HPZ86G87MQXEM9MA40BXN · Markdown: https://rewindex.com/company/fly-io/incidents/01M36HPZ86G87MQXEM9MA40BXN.md · JSON: https://rewindex.com/api/v1/companies/fly-io/incidents/01M36HPZ86G87MQXEM9MA40BXN · Generated 2026-10-18T09:59:43.059Z