Yes — gosai.fyi has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 gosai.fyi has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:2ea answers · 443✓ 2606:4700:3035::ac43:81cc answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. elliot.ns.cloudflare.com ✓lily.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://gosai.fyi/ via 2606:4700:3031::6815:2ea → 302https://lucky-truth-44c9.cloudflareaccess.com/cdn-cgi/access/login/gosai.fyi?kid=37eeac8ccd616fc8e4e52884af415f921a3fecaf84a7ad54efc539866601ebed&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.mQAkQObT3Xxxao_G33XKYv5GndnMVUAvwPFm78WEQpaeMlZ1A_67J7JjDpo52zDlWtdHotOXWp_vTc0lfBEn3X83uuu2D1xFbV4rCYu5nPAn5Fm-zbu-ubUJgqriC12oMzQCaa4rzgIn557i5eLqJUzb-fLbJrHm3jk3rXVJ7PX8K2MSJtLxgUKnwrwuaZOnk1rH0CurIVYL1awnWyyBV9iAS6L90zKZ5kw62arkq6lo1FEO18DJcTgR48ZvnADFAA42ooKhiFjwicuNN1vhuJPB2XCZ8GY5tCDkcadx9TM73htWR_2i_TLwjIY9rB65VYF3i6qPM6HuPxety65FjA&redirect_url=%2F via 2606:4700:300a::6813:c31d → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/gosai.fyi.svg)](https://aaaa.bot/gosai.fyi)

Check again

gosai.fyi Has IPv6

A (IPv4)	172.67.129.204 104.21.2.234
AAAA (IPv6)	2606:4700:3031::6815:2ea 2606:4700:3035::ac43:81cc

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

IPv6 measurement: gosai.fyi
Measured 2026-11-11 02:55:14 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.129.204, 104.21.2.234
AAAA (IPv6): 2606:4700:3031::6815:2ea, 2606:4700:3035::ac43:81cc

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: gosai.fyi has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::6815:2ea: answers (TCP 443)
    2606:4700:3035::ac43:81cc: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://gosai.fyi/ via 2606:4700:3031::6815:2ea -> HTTP 302, certificate: valid
    https://lucky-truth-44c9.cloudflareaccess.com/cdn-cgi/access/login/gosai.fyi?kid=37eeac8ccd616fc8e4e52884af415f921a3fecaf84a7ad54efc539866601ebed&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.mQAkQObT3Xxxao_G33XKYv5GndnMVUAvwPFm78WEQpaeMlZ1A_67J7JjDpo52zDlWtdHotOXWp_vTc0lfBEn3X83uuu2D1xFbV4rCYu5nPAn5Fm-zbu-ubUJgqriC12oMzQCaa4rzgIn557i5eLqJUzb-fLbJrHm3jk3rXVJ7PX8K2MSJtLxgUKnwrwuaZOnk1rH0CurIVYL1awnWyyBV9iAS6L90zKZ5kw62arkq6lo1FEO18DJcTgR48ZvnADFAA42ooKhiFjwicuNN1vhuJPB2XCZ8GY5tCDkcadx9TM73htWR_2i_TLwjIY9rB65VYF3i6qPM6HuPxety65FjA&redirect_url=%2F via 2606:4700:300a::6813:c31d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/JEaryB9QgY

Permanent link: aaaa.bot/r/JEaryB9QgY · How we measure

Checked 2026-11-11 02:55:14 UTC. Full DNS report: dns.pizza/domain/gosai.fyi · Age, certificate and blocklists: how.is/gosai.fyi · JSON: /api/v1/gosai.fyi