Traffic from Google Fiber residential service in Austin, TX (AS16591) to Fly’s shared anycast IPv4 consistently lands on the syd edge - every request from Texas crosses the Pacific twice to reach apps in ord.
Evidence (2026-08-29, reproducible on demand):
https://debug.fly.dev reports Fly-Region: syd (request id 01M16XNX1SR41EQMZ8DQQF17ST-syd).-
- Ping to my app’s shared anycast IP (
66.241.125.208): 188-191ms steady. Same connection, for comparison: Cloudflare anycast ~10-25ms; Fly’s ord2.gateway.6pn.dev (unicast) ~30ms min. The last mile is fine and unicast to ord is fast - only Fly anycast goes to Australia.
-
- Traceroute shows Google Fiber handing off to Hurricane Electric, which carries the prefix trans-Pacific:
5 23.255.225.45 92.8 ms Google Fiber
6 184.105.60.137 6.0 ms HE
7 184.105.81.166 29.4 ms HE (domestic)
9 184.105.64.221 236.3 ms HE (trans-Pacific hop)
11 103.26.68.118 184.9 ms syd
- No IPv6 on this connection, so no v6 escape hatch.
Impact: my apps (real-time game servers over WebSocket) run in ord; this route adds ~160ms over the direct path, and any loss shows up as multi-hundred-ms TCP stalls. I can work around it for development with a WireGuard tunnel pinned to the ord gateway, but ordinary users of the apps on this ISP can’t.
Ask: is this a known anycast advertisement / peering issue between HE and Fly for this prefix? Happy to run more diagnostics from this vantage point.
I don’t have Google Fiber, but my ISP is also routing to syd edge when I would expect it to go to ord or dfw.
Here is my traceroute to fly.io.
❯ sudo /opt/homebrew/sbin/mtr -bzo "LSD NABVW" -rw fly.io
Start: 2026-08-29T23:09:48-0500
HOST: brendan-m5.local Loss% Snt Drop Last Avg Best StDev Wrst
1. AS??? 172.25.1.1 0.0% 10 0 3.6 4.8 3.0 3.5 14.1
2. AS??? 100.68.32.1 0.0% 10 0 6.1 12.1 5.1 6.5 25.8
3. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
4. AS??? 10.195.12.18 0.0% 10 0 4.1 4.3 3.6 0.9 6.7
5. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
6. AS20412 ae6-15.sdsxflh01corj01.mybluepeak.net (216.16.3.64) 0.0% 10 0 4.1 4.2 3.8 0.4 5.1
7. AS20412 ae0-0.neomahc01eprj01.mybluepeak.net (76.73.201.153) 0.0% 10 0 8.4 8.6 8.4 0.2 9.0
8. AS6939 e0-2.core2.oma1.he.net (216.66.78.245) 10.0% 10 1 8.9 9.1 8.7 0.5 10.5
9. AS6939 be47.core1.oma1.he.net (184.104.188.73) 0.0% 10 0 11.9 12.0 9.9 1.7 15.6
10. AS6939 be9.core1.den1.he.net (184.104.189.26) 0.0% 10 0 188.2 188.0 186.8 0.9 190.0
11. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
12. AS6939 be48.core1.sjc1.he.net (184.105.64.221) 0.0% 10 0 187.9 187.5 186.2 0.8 188.5
13. AS6939 100ge0-58.core1.syd1.he.net (184.104.194.234) 10.0% 10 1 186.0 185.8 185.2 0.4 186.5
14. AS??? as60068.sydney.megaport.com (103.26.68.118) 0.0% 10 0 186.3 185.2 184.8 0.5 186.3
15. AS40509 ip-37-16-18-81.customer.flyio.net (37.16.18.81) 0.0% 10 0 188.7 185.7 184.9 1.2 188.7
And here is my traceroute to google.com.
❯ sudo /opt/homebrew/sbin/mtr -bzo "LSD NABVW" -rw google.com
Start: 2026-08-29T23:12:37-0500
HOST: brendan-m5.local Loss% Snt Drop Last Avg Best StDev Wrst
1. AS??? 172.25.1.1 0.0% 10 0 3.0 3.6 2.8 1.5 7.7
2. AS??? 100.68.32.1 0.0% 10 0 9.1 8.8 6.6 1.5 11.4
3. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
4. AS??? 10.195.12.18 0.0% 10 0 4.0 4.1 3.6 0.7 6.0
5. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
6. AS20412 ae6-16.sdsxflh01corj02.mybluepeak.net (216.16.3.66) 0.0% 10 0 4.3 4.1 3.6 0.5 5.1
7. AS20412 ae0-0.mnmplsc01eprj01.mybluepeak.net (76.73.201.155) 0.0% 10 0 9.8 9.7 9.3 0.4 10.5
8. AS6939 e0-5.core2.msp1.he.net (216.66.76.213) 10.0% 10 1 12.0 10.4 9.6 0.9 12.0
9. AS6939 port-channel22.core3.chi1.he.net (184.104.199.201) 50.0% 10 5 19.2 19.4 19.1 0.3 19.8
10. AS??? eqix-ch-200g-1.google.com (208.115.136.21) 0.0% 10 0 20.7 19.3 18.8 0.6 20.7
11. AS15169 192.178.249.227 0.0% 10 0 19.5 19.2 18.9 0.5 20.4
12. AS15169 74.125.252.62 0.0% 10 0 36.3 23.1 18.8 6.7 36.3
13. AS15169 142.251.234.73 0.0% 10 0 20.3 20.5 19.1 1.1 22.4
14. AS15169 216.239.49.153 0.0% 10 0 31.1 34.0 30.4 8.1 56.9
15. AS15169 192.178.73.176 0.0% 10 0 35.0 35.9 34.7 2.9 44.2
16. AS15169 142.250.59.150 0.0% 10 0 40.9 45.1 40.9 4.3 51.7
17. AS15169 216.239.63.127 0.0% 10 0 36.2 36.9 35.9 1.3 39.3
18. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
19. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
20. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
21. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
22. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
23. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
24. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
25. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
26. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
27. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
28. AS??? ??? 100.0 10 10 0.0 0.0 0.0 0.0 0.0
29. AS15169 im-in-f101.1e100.net (74.125.132.101) 0.0% 8 0 41.0 35.8 34.7 2.1 41.0
I can also run more diagnostics from where I am if that would be helpful.
The traceroute from my hotspot is not very successful, but I can confirm that the fly-request-id when on my Verizon hotspot does end in -ord, like expected.
Hi Eric, can you confirm your source IP? (output of curl https://ifconfig.me). If you have any concerns about sharing it publicly let me know and we’ll find a way for you to share it securely/in private.
Hi! This should have been fixed, mind trying again?