Yes — treeinfo.dev has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 treeinfo.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:aa66 answers · 443✓ 2606:4700:3036::6815:1c3d 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. bristol.ns.cloudflare.com ✓roan.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://treeinfo.dev/ via 2606:4700:3037::ac43:aa66 → 302https://autumn-fire-2010.cloudflareaccess.com/cdn-cgi/access/login/treeinfo.dev?kid=ee2950d2823cc10dbd4d79ec3aa08c9b7a733009c8e49c3b11a6da3edb0cb13e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.HnfcKeD5vO9MK45FXBjOovC61J7FLwRlzHlczt8qa4uzyHpyyDf_uKzNDcU4x6CQPEdZYrPP8DcVS82gE6Qv4_UrpgMPSZfamh8AB9OEI7XWJ20XhwhHpK3TEy2KJKmdDvU0OqW-4gzaoAsPjsKIOkfvS6aCeIHSAlUKGNdyWw9CCejpx28KkcQFW2PAyOKbSVOy5ysDqxt60RC_NQwhh-1G-fzdkpji2G_6MYv8zNa3eYrIpWFaTZWTO5IFfX0MBBWiPVEovCNdQoksK2L9jmW0AguZkM9lqxMT2gi0uAg9p84Tc0Yb4IEqojuzELuIx5JdU-wu6nhFCm3AUz0Dfg&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/treeinfo.dev.svg)](https://aaaa.bot/treeinfo.dev)

Check again

treeinfo.dev Has IPv6

A (IPv4)	104.21.28.61 172.67.170.102
AAAA (IPv6)	2606:4700:3037::ac43:aa66 2606:4700:3036::6815:1c3d

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: treeinfo.dev
Measured 2026-10-30 22:03:01 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.28.61, 172.67.170.102
AAAA (IPv6): 2606:4700:3037::ac43:aa66, 2606:4700:3036::6815:1c3d

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: treeinfo.dev has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:aa66: answers (TCP 443)
    2606:4700:3036::6815:1c3d: 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://treeinfo.dev/ via 2606:4700:3037::ac43:aa66 -> HTTP 302, certificate: valid
    https://autumn-fire-2010.cloudflareaccess.com/cdn-cgi/access/login/treeinfo.dev?kid=ee2950d2823cc10dbd4d79ec3aa08c9b7a733009c8e49c3b11a6da3edb0cb13e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.HnfcKeD5vO9MK45FXBjOovC61J7FLwRlzHlczt8qa4uzyHpyyDf_uKzNDcU4x6CQPEdZYrPP8DcVS82gE6Qv4_UrpgMPSZfamh8AB9OEI7XWJ20XhwhHpK3TEy2KJKmdDvU0OqW-4gzaoAsPjsKIOkfvS6aCeIHSAlUKGNdyWw9CCejpx28KkcQFW2PAyOKbSVOy5ysDqxt60RC_NQwhh-1G-fzdkpji2G_6MYv8zNa3eYrIpWFaTZWTO5IFfX0MBBWiPVEovCNdQoksK2L9jmW0AguZkM9lqxMT2gi0uAg9p84Tc0Yb4IEqojuzELuIx5JdU-wu6nhFCm3AUz0Dfg&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/znHbL-LJF8

Permanent link: aaaa.bot/r/znHbL-LJF8 · How we measure

Checked 2026-10-30 22:03:01 UTC. Full DNS report: dns.pizza/domain/treeinfo.dev · JSON: /api/v1/treeinfo.dev