Yes — craic.site 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 craic.site has an AAAA record and answers on it. ✓ 2001:880:a:337::20e answers · 443	yes
www over IPv6 www.craic.site has an AAAA record and answers on it. ✓ 2001:880:a:337::20e 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. dns1.registrar-servers.com ✓dns2.registrar-servers.com ✓	yes

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

https://craic.site/ via 2001:880:a:337::20e → 200

works

What's keeping craic.site 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

craic.site Has IPv6

A (IPv4)	85.190.121.75
AAAA (IPv6)	2001:880:a:337::20e

www.craic.site Has IPv6

Alias of	craic.site
A (IPv4)	85.190.121.75
AAAA (IPv6)	2001:880:a:337::20e

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: craic.site
Measured 2026-11-11 08:36:41 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    85.190.121.75
AAAA (IPv6): 2001:880:a:337::20e
www AAAA:    2001:880:a:337::20e

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: craic.site has an AAAA record and answers on it.
    2001:880:a:337::20e: answers (TCP 443)
- www over IPv6: www.craic.site has an AAAA record and answers on it.
    2001:880:a:337::20e: 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: HTTP 200.
    https://craic.site/ via 2001:880:a:337::20e -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/X3cBa1IuR-

Permanent link: aaaa.bot/r/X3cBa1IuR- · How we measure

Checked 2026-11-11 08:36:41 UTC. Full DNS report: dns.pizza/domain/craic.site · Age, certificate and blocklists: how.is/craic.site · JSON: /api/v1/craic.site