Yes — williamsfamilytree.org has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 williamsfamilytree.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3036::6815:54f0 answers · 443✓ 2606:4700:3036::ac43:c6e5 answers · 443	yes
www over IPv6 www.williamsfamilytree.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3036::ac43:c6e5 answers · 443✓ 2606:4700:3036::6815:54f0 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. eforward1.registrar-servers.com ✗eforward2.registrar-servers.com ✗eforward3.registrar-servers.com ✗eforward4.registrar-servers.com ✗eforward5.registrar-servers.com ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. justin.ns.cloudflare.com ✓oaklyn.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://williamsfamilytree.org/ via 2606:4700:3036::6815:54f0 → 302https://williamsfamilytree.cloudflareaccess.com/cdn-cgi/access/login/williamsfamilytree.org?kid=d3979d0825922bbf29762b09e08118a3e171c8f18682ebc4cfecf8b379384838&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.r-iQjW9ySTtSElWPQrar03Amnrca9maCtdQY37803Di1VsxlU0xqV7nfjWcWMynL7tmeu0XY4UloqTyGb5W6LEJKhoDBIrEBVQXu0BOolJReKA9B1R2Yvf2R-tqxMPHm4lXecjTJ82RCYIipQr3i-Hr-0DWvLxHsvqfsHMFM4XnqNMlTVoInJ9ndajrMiB_dOmqoaJC45W2Wk9xfM-mASpaG1n48IYaqr9iiAPZVsoF078TyXpDqHSdgSlKkyYpUjJyjomxr-xHFPheawvhDAjiLIULrw43uxr3HhRc26BdHDEptGtXjru21wejxqt5sRPL8QKZ9e9nuO9pbke784g&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

What's keeping williamsfamilytree.org from an A

Mail servers without IPv6
eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com, eforward4.registrar-servers.com, eforward5.registrar-servers.com have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

williamsfamilytree.org Has IPv6

A (IPv4)	172.67.198.229 104.21.84.240
AAAA (IPv6)	2606:4700:3036::6815:54f0 2606:4700:3036::ac43:c6e5

www.williamsfamilytree.org Has IPv6

A (IPv4)	104.21.84.240 172.67.198.229
AAAA (IPv6)	2606:4700:3036::ac43:c6e5 2606:4700:3036::6815:54f0

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: williamsfamilytree.org
Measured 2026-11-15 15:08:03 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.198.229, 104.21.84.240
AAAA (IPv6): 2606:4700:3036::6815:54f0, 2606:4700:3036::ac43:c6e5
www AAAA:    2606:4700:3036::ac43:c6e5, 2606:4700:3036::6815:54f0

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: williamsfamilytree.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3036::6815:54f0: answers (TCP 443)
    2606:4700:3036::ac43:c6e5: answers (TCP 443)
- www over IPv6: www.williamsfamilytree.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3036::ac43:c6e5: answers (TCP 443)
    2606:4700:3036::6815:54f0: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers 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://williamsfamilytree.org/ via 2606:4700:3036::6815:54f0 -> HTTP 302, certificate: valid
    https://williamsfamilytree.cloudflareaccess.com/cdn-cgi/access/login/williamsfamilytree.org?kid=d3979d0825922bbf29762b09e08118a3e171c8f18682ebc4cfecf8b379384838&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6ImQzOTc5ZDA4MjU5MjJiYmYyOTc2MmIwOWUwODExOGEzZTE3MWM4ZjE4NjgyZWJjNGNmZWNmOGIzNzkzODQ4MzgiLCJob3N0bmFtZSI6IndpbGxpYW1zZmFtaWx5dHJlZS5vcmciLCJyZWRpcmVjdF91cmwiOiIvIiwic2VydmljZV90b2tlbl9zdGF0dXMiOmZhbHNlLCJpc193YXJwIjpmYWxzZSwiaXNfZ2F0ZXdheSI6ZmFsc2UsImV4cCI6MTc5NDc1NTU4MywibmJmIjoxNzk0NzU1MjgzLCJpYXQiOjE3OTQ3NTUyODMsImF1dGhfc3RhdHVzIjoiTk9ORSIsIm10bHNfYXV0aCI6eyJjZXJ0X2lzc3Vlcl9kbiI6IiIsImNlcnRfc2VyaWFsIjoiIiwiY2VydF9pc3N1ZXJfc2tpIjoiIiwiY2VydF9wcmVzZW50ZWQiOmZhbHNlLCJjb21tb25fbmFtZSI6IiIsImF1dGhfc3RhdHVzIjoiTk9ORSJ9LCJyZWFsX2NvdW50cnkiOiJVUyIsImFwcF9zZXNzaW9uX2hhc2giOiJjMmNmZjAzNWMzMTdkZDg1MDAwZmQxZTIxZTZkMDFiYTRkZGI3MTI0NTQ1MDcyMTIyM2NmMjNkMTQ3ZWUwNmZhIn0.r-iQjW9ySTtSElWPQrar03Amnrca9maCtdQY37803Di1VsxlU0xqV7nfjWcWMynL7tmeu0XY4UloqTyGb5W6LEJKhoDBIrEBVQXu0BOolJReKA9B1R2Yvf2R-tqxMPHm4lXecjTJ82RCYIipQr3i-Hr-0DWvLxHsvqfsHMFM4XnqNMlTVoInJ9ndajrMiB_dOmqoaJC45W2Wk9xfM-mASpaG1n48IYaqr9iiAPZVsoF078TyXpDqHSdgSlKkyYpUjJyjomxr-xHFPheawvhDAjiLIULrw43uxr3HhRc26BdHDEptGtXjru21wejxqt5sRPL8QKZ9e9nuO9pbke784g&redirect_url=%2F 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/8NrBn4ziTZ

Permanent link: aaaa.bot/r/8NrBn4ziTZ · How we measure

Checked 2026-11-15 15:08:03 UTC. Full DNS report: dns.pizza/domain/williamsfamilytree.org · Age, certificate and blocklists: how.is/williamsfamilytree.org · JSON: /api/v1/williamsfamilytree.org