Yes — zenkotest.win has IPv6.

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

Measured 2026-11-02 01:23 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check zenkotest.win now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 zenkotest.win has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:d37c answers · 443✓ 2606:4700:3036::6815:45b6 answers · 443	yes
www over IPv6 www.zenkotest.win has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:d37c answers · 443✓ 2606:4700:3036::6815:45b6 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. lisa.ns.cloudflare.com ✓weston.ns.cloudflare.com ✓	yes

First measured 2026-11-02; last confirmed 2026-11-02.

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

https://zenkotest.win/ via 2606:4700:3031::ac43:d37c → 302https://foxnyx.cloudflareaccess.com/cdn-cgi/access/login/zenkotest.win?kid=86493e567715a0966de894a16132663266d239896fbe889c8f36d00e344cca50&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjM0NzE2OGNiNzBhMDYyMTE3NmZlZTNiNTdkYzY4ODk0YjBkYjM3ZTllZWVmNzljMzIzOTYzMWI4ZDlmNGYzNzYifQ.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.iP94HglpTkpCozT9YDQUNrKWbxxupmcw_h_-aV-tqgqn0izzm5iiEqG4nL61R7NRqrzDzWQE3JQnlNDtItj6UEN2nz2igFMZHOykT2lc-4Vm4BXiWE6ABG9SlGIfEyk-CepFVj_6E-HZ5uN3eas2QOdxoABMiqKc8NjPnxD97v0wXUKjcj-oa4VKzGwttQ2eIlddFXfquxHGx3SnamFfiE4lxjWcjfHv_jaZ0hWvV05q07OJOfzmmZSHIFtuKYbXWzYFt_pIptT58HdUcbnVQk37z4wZGhzv5mq0hKuiMjJmih7_cL0DXIlQjB4yKHOp4HvzMZEKUJ294n6MWv6FgA&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/zenkotest.win.svg)](https://aaaa.bot/zenkotest.win)

Check again

zenkotest.win Has IPv6

A (IPv4)	172.67.211.124 104.21.69.182
AAAA (IPv6)	2606:4700:3031::ac43:d37c 2606:4700:3036::6815:45b6

www.zenkotest.win Has IPv6

A (IPv4)	172.67.211.124 104.21.69.182
AAAA (IPv6)	2606:4700:3031::ac43:d37c 2606:4700:3036::6815:45b6

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: zenkotest.win
Measured 2026-11-02 01:23:00 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.211.124, 104.21.69.182
AAAA (IPv6): 2606:4700:3031::ac43:d37c, 2606:4700:3036::6815:45b6
www AAAA:    2606:4700:3031::ac43:d37c, 2606:4700:3036::6815:45b6

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: zenkotest.win has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:d37c: answers (TCP 443)
    2606:4700:3036::6815:45b6: answers (TCP 443)
- www over IPv6: www.zenkotest.win has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:d37c: answers (TCP 443)
    2606:4700:3036::6815:45b6: 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://zenkotest.win/ via 2606:4700:3031::ac43:d37c -> HTTP 302, certificate: valid
    https://foxnyx.cloudflareaccess.com/cdn-cgi/access/login/zenkotest.win?kid=86493e567715a0966de894a16132663266d239896fbe889c8f36d00e344cca50&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjM0NzE2OGNiNzBhMDYyMTE3NmZlZTNiNTdkYzY4ODk0YjBkYjM3ZTllZWVmNzljMzIzOTYzMWI4ZDlmNGYzNzYifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6Ijg2NDkzZTU2NzcxNWEwOTY2ZGU4OTRhMTYxMzI2NjMyNjZkMjM5ODk2ZmJlODg5YzhmMzZkMDBlMzQ0Y2NhNTAiLCJob3N0bmFtZSI6InplbmtvdGVzdC53aW4iLCJyZWRpcmVjdF91cmwiOiIvIiwic2VydmljZV90b2tlbl9zdGF0dXMiOmZhbHNlLCJpc193YXJwIjpmYWxzZSwiaXNfZ2F0ZXdheSI6ZmFsc2UsImV4cCI6MTc5MzU4Mjg4MCwibmJmIjoxNzkzNTgyNTgwLCJpYXQiOjE3OTM1ODI1ODAsImF1dGhfc3RhdHVzIjoiTk9ORSIsIm10bHNfYXV0aCI6eyJjZXJ0X2lzc3Vlcl9kbiI6IiIsImNlcnRfc2VyaWFsIjoiIiwiY2VydF9pc3N1ZXJfc2tpIjoiIiwiY2VydF9wcmVzZW50ZWQiOmZhbHNlLCJjb21tb25fbmFtZSI6IiIsImF1dGhfc3RhdHVzIjoiTk9ORSJ9LCJyZWFsX2NvdW50cnkiOiJVUyIsImFwcF9zZXNzaW9uX2hhc2giOiJkZDdlOWJkZWY3OTkzYjgyYzc2Yzc5MDJkZDJjMTA2YzAzNTgyYWRhNDRhZDVkYzJiZmFiYmEzMWFlNTc2OThhIn0.iP94HglpTkpCozT9YDQUNrKWbxxupmcw_h_-aV-tqgqn0izzm5iiEqG4nL61R7NRqrzDzWQE3JQnlNDtItj6UEN2nz2igFMZHOykT2lc-4Vm4BXiWE6ABG9SlGIfEyk-CepFVj_6E-HZ5uN3eas2QOdxoABMiqKc8NjPnxD97v0wXUKjcj-oa4VKzGwttQ2eIlddFXfquxHGx3SnamFfiE4lxjWcjfHv_jaZ0hWvV05q07OJOfzmmZSHIFtuKYbXWzYFt_pIptT58HdUcbnVQk37z4wZGhzv5mq0hKuiMjJmih7_cL0DXIlQjB4yKHOp4HvzMZEKUJ294n6MWv6FgA&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/3Q8p_cE9nO

Permanent link: aaaa.bot/r/3Q8p_cE9nO · How we measure

Checked 2026-11-02 01:23:00 UTC. Full DNS report: dns.pizza/domain/zenkotest.win · JSON: /api/v1/zenkotest.win