Has both IPv4 (A) and IPv6 (AAAA) addresses.
fly.io IPv6 ready
| A (IPv4) | 37.16.18.81 |
|---|---|
| AAAA (IPv6) | 2a09:8280:1::a:791 |
www.fly.io IPv6 ready
| Alias of | fly.io |
|---|---|
| A (IPv4) | 37.16.18.81 |
| AAAA (IPv6) | 2a09:8280:1::a:791 |
Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).
Checked 2026-10-30 00:13:00 UTC. Full DNS report: dns.pizza/domain/fly.io · JSON: /api/v1/fly.io