Yes — taxauction.org has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 taxauction.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3036::6815:4565 answers · 443✓ 2606:4700:3033::ac43:cf67 answers · 443	yes
www over IPv6 www.taxauction.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::ac43:cf67 answers · 443✓ 2606:4700:3036::6815:4565 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. anuj.ns.cloudflare.com ✓diva.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://taxauction.org/ via 2606:4700:3036::6815:4565 → 302https://pleeb.cloudflareaccess.com/cdn-cgi/access/login/taxauction.org?kid=84afb8dc24678df2fe763673bb6e93f003c27288ea1b625eb7e5094381fb1553&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjA4ZDMzYTFjYzRmZWQwZTIyMWE3N2Q3NTMwMzg4ZGZiNDE2ZGQ0NzU5ZDNlNWJlZWJkZDk4ZTA4MzQ1MjNjZGIifQ.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.GW2EjB9QfzveXwVuDrcrc22b9ecnNXtve4V1gQoBGDyx_SFZSJbVO4eMsonft6sg5Bmd9AvmbgutRSHCl_StmM9gCST7nhGLHyuuM7m-3Qz_auFrPvoZ_h6J8omTUyQlTO6RnrFGkKHUWzjbBOuvbw6rNacwyrlOP3_y4mEQA8IjjTHt-LYhiNOlBXyk-98gEuynSseNiPtOObBLoN2XKjYIcKLZj9wcJxIe0cuwU7roCzcDfrUIVJIcDda5L7jgfv0GD5eFYrfurN5pdesN2IeijE5Vx0Vq2QeSp3nxupKH3vDCdJO1W6QEZYdZrpIQLqRHBP7dheUztOGQj3Sslg&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/taxauction.org.svg)](https://aaaa.bot/taxauction.org)

Check again

taxauction.org Has IPv6

A (IPv4)	104.21.69.101 172.67.207.103
AAAA (IPv6)	2606:4700:3036::6815:4565 2606:4700:3033::ac43:cf67

www.taxauction.org Has IPv6

A (IPv4)	172.67.207.103 104.21.69.101
AAAA (IPv6)	2606:4700:3033::ac43:cf67 2606:4700:3036::6815:4565

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: taxauction.org
Measured 2026-11-13 05:35:01 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.69.101, 172.67.207.103
AAAA (IPv6): 2606:4700:3036::6815:4565, 2606:4700:3033::ac43:cf67
www AAAA:    2606:4700:3033::ac43:cf67, 2606:4700:3036::6815:4565

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: taxauction.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3036::6815:4565: answers (TCP 443)
    2606:4700:3033::ac43:cf67: answers (TCP 443)
- www over IPv6: www.taxauction.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::ac43:cf67: answers (TCP 443)
    2606:4700:3036::6815:4565: 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://taxauction.org/ via 2606:4700:3036::6815:4565 -> HTTP 302, certificate: valid
    https://pleeb.cloudflareaccess.com/cdn-cgi/access/login/taxauction.org?kid=84afb8dc24678df2fe763673bb6e93f003c27288ea1b625eb7e5094381fb1553&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjA4ZDMzYTFjYzRmZWQwZTIyMWE3N2Q3NTMwMzg4ZGZiNDE2ZGQ0NzU5ZDNlNWJlZWJkZDk4ZTA4MzQ1MjNjZGIifQ.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.GW2EjB9QfzveXwVuDrcrc22b9ecnNXtve4V1gQoBGDyx_SFZSJbVO4eMsonft6sg5Bmd9AvmbgutRSHCl_StmM9gCST7nhGLHyuuM7m-3Qz_auFrPvoZ_h6J8omTUyQlTO6RnrFGkKHUWzjbBOuvbw6rNacwyrlOP3_y4mEQA8IjjTHt-LYhiNOlBXyk-98gEuynSseNiPtOObBLoN2XKjYIcKLZj9wcJxIe0cuwU7roCzcDfrUIVJIcDda5L7jgfv0GD5eFYrfurN5pdesN2IeijE5Vx0Vq2QeSp3nxupKH3vDCdJO1W6QEZYdZrpIQLqRHBP7dheUztOGQj3Sslg&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/IBXm_1jQXt

Permanent link: aaaa.bot/r/IBXm_1jQXt · How we measure

Checked 2026-11-13 05:35:01 UTC. Full DNS report: dns.pizza/domain/taxauction.org · Age, certificate and blocklists: how.is/taxauction.org · JSON: /api/v1/taxauction.org