Yes — codabot.dev has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 codabot.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::ac43:a649 answers · 443✓ 2606:4700:3033::6815:3af4 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. aarav.ns.cloudflare.com ✓hattie.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://codabot.dev/ via 2606:4700:3034::ac43:a649 → 302https://codabot.dev/app via 2606:4700:3034::ac43:a649 → 302https://nicolaszimmer.cloudflareaccess.com/cdn-cgi/access/login/codabot.dev?kid=9ebe17b0d3fe343fcced64d8d2dff40d657eaed6895a30b38a2446ba5081f917&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImIxZWNjMjFjZjI5NWVkNDc4NmY2ODcxY2I1ZDcwYjYzNWU2MDI2N2QxY2QxZGJhNTNhMzdhZWEwOWVlNmE3NmIifQ.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.Jnr6qXOwW0ODYi-YM5nqQeHfRZiTh-nV9cMKyzG1bUid8zdBPy4K7eWDWAj3OhJtSnDXLOVoKrIqv7t3O5JizkIDHOaYE9d418szgep-_J4bgCSfPvxqbdlN2cIcHmvZq9XUbWLlIoP7bkdmPovTyahQ9LQwnqux1avK5V8UXWWyF8sOLMlCAMinU3hDrMtvj-jmjaySiGcTae9PfsM4QoIgVkS9yhHqzT1Q8C8toA4KA7vfqbHhBIgSZ1pUrAkDTkiIJNSrHEFLGZdI61icASAoiIGu4a9ecEK-ASuGqNSeYEPUCOYjMy4kWu69HaiZRb-KeisTCICXBbAH_STJyw&redirect_url=%2Fapp 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/codabot.dev.svg)](https://aaaa.bot/codabot.dev)

Check again

codabot.dev Has IPv6

A (IPv4)	172.67.166.73 104.21.58.244
AAAA (IPv6)	2606:4700:3034::ac43:a649 2606:4700:3033::6815:3af4

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: codabot.dev
Measured 2026-11-08 07:07:26 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.166.73, 104.21.58.244
AAAA (IPv6): 2606:4700:3034::ac43:a649, 2606:4700:3033::6815:3af4

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: codabot.dev has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::ac43:a649: answers (TCP 443)
    2606:4700:3033::6815:3af4: 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://codabot.dev/ via 2606:4700:3034::ac43:a649 -> HTTP 302, certificate: valid
    https://codabot.dev/app via 2606:4700:3034::ac43:a649 -> HTTP 302, certificate: valid
    https://nicolaszimmer.cloudflareaccess.com/cdn-cgi/access/login/codabot.dev?kid=9ebe17b0d3fe343fcced64d8d2dff40d657eaed6895a30b38a2446ba5081f917&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImIxZWNjMjFjZjI5NWVkNDc4NmY2ODcxY2I1ZDcwYjYzNWU2MDI2N2QxY2QxZGJhNTNhMzdhZWEwOWVlNmE3NmIifQ.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.Jnr6qXOwW0ODYi-YM5nqQeHfRZiTh-nV9cMKyzG1bUid8zdBPy4K7eWDWAj3OhJtSnDXLOVoKrIqv7t3O5JizkIDHOaYE9d418szgep-_J4bgCSfPvxqbdlN2cIcHmvZq9XUbWLlIoP7bkdmPovTyahQ9LQwnqux1avK5V8UXWWyF8sOLMlCAMinU3hDrMtvj-jmjaySiGcTae9PfsM4QoIgVkS9yhHqzT1Q8C8toA4KA7vfqbHhBIgSZ1pUrAkDTkiIJNSrHEFLGZdI61icASAoiIGu4a9ecEK-ASuGqNSeYEPUCOYjMy4kWu69HaiZRb-KeisTCICXBbAH_STJyw&redirect_url=%2Fapp 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/L0hzIxExld

Permanent link: aaaa.bot/r/L0hzIxExld · How we measure

Checked 2026-11-08 07:07:26 UTC. Full DNS report: dns.pizza/domain/codabot.dev · Age, certificate and blocklists: how.is/codabot.dev · JSON: /api/v1/codabot.dev