Yes — robotarena.win has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 robotarena.win has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:3260 answers · 443✓ 2606:4700:3033::ac43:9fef answers · 443	yes
www over IPv6 www.robotarena.win has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:3260 answers · 443✓ 2606:4700:3033::ac43:9fef 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. clark.ns.cloudflare.com ✓aryanna.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://robotarena.win/ via 2606:4700:3031::6815:3260 → 302https://blue-mode-434e.cloudflareaccess.com/cdn-cgi/access/login/robotarena.win?kid=3903e72640b300b3f89839dc7ff4e4da529348efab845ebaf10500fa38b2d41a&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6IjM5MDNlNzI2NDBiMzAwYjNmODk4MzlkYzdmZjRlNGRhNTI5MzQ4ZWZhYjg0NWViYWYxMDUwMGZhMzhiMmQ0MWEiLCJob3N0bmFtZSI6InJvYm90YXJlbmEud2luIiwicmVkaXJlY3RfdXJsIjoiLyIsInNlcnZpY2VfdG9rZW5fc3RhdHVzIjpmYWxzZSwiaXNfd2FycCI6ZmFsc2UsImlzX2dhdGV3YXkiOmZhbHNlLCJleHAiOjE3OTM0Mzk3MDQsIm5iZiI6MTc5MzQzOTQwNCwiaWF0IjoxNzkzNDM5NDA0LCJhdXRoX3N0YXR1cyI6Ik5PTkUiLCJtdGxzX2F1dGgiOnsiY2VydF9pc3N1ZXJfZG4iOiIiLCJjZXJ0X3NlcmlhbCI6IiIsImNlcnRfaXNzdWVyX3NraSI6IiIsImNlcnRfcHJlc2VudGVkIjpmYWxzZSwiY29tbW9uX25hbWUiOiIiLCJhdXRoX3N0YXR1cyI6Ik5PTkUifSwicmVhbF9jb3VudHJ5IjoiVVMiLCJhcHBfc2Vzc2lvbl9oYXNoIjoiYTdlOGQwMDAyZWQzNDkzMWRkMmQ3MzIxMTdlMTBkMzFjOTU1NjkwODZiYTRkYjg3M2QwMjM3OGMyYjdhNzZjZSJ9.AerGPthf2-6iH544wiDArJUz4Q8b29pPMPYbvqjgW-VFMQWswFKy7HqrLS6SBSfaRb6aLe0GYrBuCSbnNRDJVa-EveWYHJQoifH9KaCUN1FPv1OTAJ9VJxY8QKpAVwLwMQzvitFTw000MLkN44QyFdq7Rmw4VCBdHOysIu4pO209AHBwrqRg4wOH-d0o60uXRkxn_qMgKCMZNxf0_4NYwPOxfLjxcujiD8Wfw0mVZalhOKfPa_zt3VV4FM30hHKjBA7GM4GvNfIEhB0BsKzY86R8BZP2FP7EOaZlle8PCLJAxJC5VCJhlVcmTssmI180eYe7xNAFX4wJ63ib5v9Dvg&redirect_url=%2F via 2606:4700:300a::6813:c21d → 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/robotarena.win.svg)](https://aaaa.bot/robotarena.win)

Check again

robotarena.win Has IPv6

A (IPv4)	104.21.50.96 172.67.159.239
AAAA (IPv6)	2606:4700:3031::6815:3260 2606:4700:3033::ac43:9fef

www.robotarena.win Has IPv6

A (IPv4)	104.21.50.96 172.67.159.239
AAAA (IPv6)	2606:4700:3031::6815:3260 2606:4700:3033::ac43:9fef

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: robotarena.win
Measured 2026-10-31 09:36:44 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.50.96, 172.67.159.239
AAAA (IPv6): 2606:4700:3031::6815:3260, 2606:4700:3033::ac43:9fef
www AAAA:    2606:4700:3031::6815:3260, 2606:4700:3033::ac43:9fef

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: robotarena.win has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::6815:3260: answers (TCP 443)
    2606:4700:3033::ac43:9fef: answers (TCP 443)
- www over IPv6: www.robotarena.win has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::6815:3260: answers (TCP 443)
    2606:4700:3033::ac43:9fef: 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://robotarena.win/ via 2606:4700:3031::6815:3260 -> HTTP 302, certificate: valid
    https://blue-mode-434e.cloudflareaccess.com/cdn-cgi/access/login/robotarena.win?kid=3903e72640b300b3f89839dc7ff4e4da529348efab845ebaf10500fa38b2d41a&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.AerGPthf2-6iH544wiDArJUz4Q8b29pPMPYbvqjgW-VFMQWswFKy7HqrLS6SBSfaRb6aLe0GYrBuCSbnNRDJVa-EveWYHJQoifH9KaCUN1FPv1OTAJ9VJxY8QKpAVwLwMQzvitFTw000MLkN44QyFdq7Rmw4VCBdHOysIu4pO209AHBwrqRg4wOH-d0o60uXRkxn_qMgKCMZNxf0_4NYwPOxfLjxcujiD8Wfw0mVZalhOKfPa_zt3VV4FM30hHKjBA7GM4GvNfIEhB0BsKzY86R8BZP2FP7EOaZlle8PCLJAxJC5VCJhlVcmTssmI180eYe7xNAFX4wJ63ib5v9Dvg&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/1-0q6C4eSn

Permanent link: aaaa.bot/r/1-0q6C4eSn · How we measure

Checked 2026-10-31 09:36:44 UTC. Full DNS report: dns.pizza/domain/robotarena.win · JSON: /api/v1/robotarena.win