Yes — ens.domains has IPv6.

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

Measured 2026-11-12 02:36 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check ens.domains now

IPv6 readiness

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

Website over IPv6 ens.domains has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:14ea answers · 443✓ 2606:4700::6812:15ea answers · 443	yes
www over IPv6 www.ens.domains has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:14ea answers · 443✓ 2606:4700::6812:15ea answers · 443	yes
Mail servers (MX) have IPv6 At least one mail server has no AAAA record (5 of 6 checked do). aspmx.l.google.com ✓alt1.aspmx.l.google.com ✓alt2.aspmx.l.google.com ✓alt3.aspmx.l.google.com ✓alt4.aspmx.l.google.com ✓k4n6ljgtvhlybmvmepp4yirpvypcqvqx35q3sstewteavvst353q.mx-verification.google.com ✗	partly
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ben.ns.cloudflare.com ✓desiree.ns.cloudflare.com ✓	yes

First measured 2026-11-04; last confirmed 2026-11-12.

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

https://ens.domains/ via 2606:4700::6812:14ea → 200

works

What's keeping ens.domains from an A

Mail servers without IPv6
k4n6ljgtvhlybmvmepp4yirpvypcqvqx35q3sstewteavvst353q.mx-verification.google.com has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

ens.domains Has IPv6

A (IPv4)	104.18.20.234 104.18.21.234
AAAA (IPv6)	2606:4700::6812:14ea 2606:4700::6812:15ea

www.ens.domains Has IPv6

A (IPv4)	104.18.20.234 104.18.21.234
AAAA (IPv6)	2606:4700::6812:14ea 2606:4700::6812:15ea

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: ens.domains
Measured 2026-11-12 02:36:54 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.20.234, 104.18.21.234
AAAA (IPv6): 2606:4700::6812:14ea, 2606:4700::6812:15ea
www AAAA:    2606:4700::6812:14ea, 2606:4700::6812:15ea

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: ens.domains has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:14ea: answers (TCP 443)
    2606:4700::6812:15ea: answers (TCP 443)
- www over IPv6: www.ens.domains has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:14ea: answers (TCP 443)
    2606:4700::6812:15ea: answers (TCP 443)
- Mail servers (MX) have IPv6: At least one mail server has no AAAA record (5 of 6 checked do).
- 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: HTTP 200.
    https://ens.domains/ via 2606:4700::6812:14ea -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/xjF3GsmTL9

Permanent link: aaaa.bot/r/xjF3GsmTL9 · How we measure

Checked 2026-11-12 02:36:54 UTC. Full DNS report: dns.pizza/domain/ens.domains · Age, certificate and blocklists: how.is/ens.domains · JSON: /api/v1/ens.domains