Yes — ultron.observer has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 ultron.observer has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:76 answers · 443✓ 2606:4700:3032::ac43:96ee 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. christina.ns.cloudflare.com ✓lex.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 2 redirects: HTTP 200.

https://ultron.observer/ via 2606:4700:3032::6815:76 → 302https://game.ultron.observer/ via 2606:4700:3032::6815:76 → 302https://dry-bush-ab75.cloudflareaccess.com/cdn-cgi/access/login/game.ultron.observer?kid=6e3941ac5bd1bcd0b9bd283cb93b74e9faf5dfb5e591c8f1b04536abcd963670&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.i-SNSm6E7p1lK_gtT55ubXrMsDfBQNZP0VSS06Jg_tynvrUh9Y0WUaUZAH92CorLxr_tRYUJx8JmTMNM0T3qL4d_UK7B2r933zvBsI_JZU_GBe2esoC_KWItifluP5HKTXAklbtACvGl7rKVFv2hasYrlQMp7z22oRj0D_7rncY9HBNAjUx8J2hJ39aVE-RIrPQlSAp5Nb4DwgSx0b8Swo8EtEMb58MUZZkmzn3CjpdMPMhRfKsshkSxTWpzR_IeY7dV-fx5EELIioSS7vUH3GhbTdLMn_r1IhqTganViGG08u0o3Oh2sSOJZR70NkM2-zMlhSxBTKEOBzlaLn90aA&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/ultron.observer.svg)](https://aaaa.bot/ultron.observer)

Check again

ultron.observer Has IPv6

A (IPv4)	172.67.150.238 104.21.0.118
AAAA (IPv6)	2606:4700:3032::6815:76 2606:4700:3032::ac43:96ee

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: ultron.observer
Measured 2026-11-14 17:40:42 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.150.238, 104.21.0.118
AAAA (IPv6): 2606:4700:3032::6815:76, 2606:4700:3032::ac43:96ee

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: ultron.observer has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:76: answers (TCP 443)
    2606:4700:3032::ac43:96ee: 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 2 redirects: HTTP 200.
    https://ultron.observer/ via 2606:4700:3032::6815:76 -> HTTP 302, certificate: valid
    https://game.ultron.observer/ via 2606:4700:3032::6815:76 -> HTTP 302, certificate: valid
    https://dry-bush-ab75.cloudflareaccess.com/cdn-cgi/access/login/game.ultron.observer?kid=6e3941ac5bd1bcd0b9bd283cb93b74e9faf5dfb5e591c8f1b04536abcd963670&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.i-SNSm6E7p1lK_gtT55ubXrMsDfBQNZP0VSS06Jg_tynvrUh9Y0WUaUZAH92CorLxr_tRYUJx8JmTMNM0T3qL4d_UK7B2r933zvBsI_JZU_GBe2esoC_KWItifluP5HKTXAklbtACvGl7rKVFv2hasYrlQMp7z22oRj0D_7rncY9HBNAjUx8J2hJ39aVE-RIrPQlSAp5Nb4DwgSx0b8Swo8EtEMb58MUZZkmzn3CjpdMPMhRfKsshkSxTWpzR_IeY7dV-fx5EELIioSS7vUH3GhbTdLMn_r1IhqTganViGG08u0o3Oh2sSOJZR70NkM2-zMlhSxBTKEOBzlaLn90aA&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/y2UoS0AgoB

Permanent link: aaaa.bot/r/y2UoS0AgoB · How we measure

Checked 2026-11-14 17:40:42 UTC. Full DNS report: dns.pizza/domain/ultron.observer · Age, certificate and blocklists: how.is/ultron.observer · JSON: /api/v1/ultron.observer