Yes — minatoletter.com 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 minatoletter.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:17ba answers · 443✓ 2606:4700::6812:16ba answers · 443	yes
www over IPv6 www.minatoletter.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:16ba answers · 443✓ 2606:4700::6812:17ba answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. fwd1.porkbun.com ✗fwd2.porkbun.com ✗	no
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. curitiba.ns.porkbun.com ✓fortaleza.ns.porkbun.com ✓maceio.ns.porkbun.com ✓salvador.ns.porkbun.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 401.

https://minatoletter.com/ via 2606:4700::6812:17ba → 401

works

What's keeping minatoletter.com from an A

Mail servers without IPv6
fwd1.porkbun.com, fwd2.porkbun.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

minatoletter.com Has IPv6

A (IPv4)	104.18.23.186 104.18.22.186
AAAA (IPv6)	2606:4700::6812:17ba 2606:4700::6812:16ba

www.minatoletter.com Has IPv6

Alias of	custom-domains.chatgpt.site
A (IPv4)	104.18.23.186 104.18.22.186
AAAA (IPv6)	2606:4700::6812:16ba 2606:4700::6812:17ba

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: minatoletter.com
Measured 2026-11-10 02:11:56 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.23.186, 104.18.22.186
AAAA (IPv6): 2606:4700::6812:17ba, 2606:4700::6812:16ba
www AAAA:    2606:4700::6812:16ba, 2606:4700::6812:17ba

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: minatoletter.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:17ba: answers (TCP 443)
    2606:4700::6812:16ba: answers (TCP 443)
- www over IPv6: www.minatoletter.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:16ba: answers (TCP 443)
    2606:4700::6812:17ba: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 4 of 4 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 401.
    https://minatoletter.com/ via 2606:4700::6812:17ba -> HTTP 401, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/83ghxLy6ie

Permanent link: aaaa.bot/r/83ghxLy6ie · How we measure

Checked 2026-11-10 02:11:56 UTC. Full DNS report: dns.pizza/domain/minatoletter.com · Age, certificate and blocklists: how.is/minatoletter.com · JSON: /api/v1/minatoletter.com