Yes — kourai.run has IPv6.

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

This is a saved measurement from 2026-11-02 04:48 UTC. Check kourai.run live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
kourai.run has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3036::ac43:be4a answers · 443✓ 2606:4700:3033::6815:51bd answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
inbound.postmarkapp.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
kallie.ns.cloudflare.com ✓sage.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 404.
https://kourai.run/ via 2606:4700:3036::ac43:be4a → 404
works

What's keeping kourai.run from an A

  1. Mail servers without IPv6
    inbound.postmarkapp.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

kourai.run  Has IPv6

A (IPv4)172.67.190.74
104.21.81.189
AAAA (IPv6)2606:4700:3036::ac43:be4a
2606:4700:3033::6815:51bd

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

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

Checked 2026-11-02 04:48:16 UTC. Full DNS report: dns.pizza/domain/kourai.run · Age, certificate and blocklists: how.is/kourai.run · JSON: /api/v1/kourai.run