Yes — maffcode.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 maffcode.site has 4 IPv6 addresses and answers on every one we tested. ✓ 2a00:15f8:a000:5:1:12:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:11:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:14:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:13:8:69c9 answers · 443	yes
www over IPv6 www.maffcode.site has 4 IPv6 addresses and answers on every one we tested. ✓ 2a00:15f8:a000:5:1:14:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:12:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:11:8:69c9 answers · 443✓ 2a00:15f8:a000:5:1:13:8:69c9 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. mx1.masterhost.ru ✗	no
Nameservers have IPv6 3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1.masterhost.ru ✓ns2.masterhost.ru ✓ns.masterhost.ru ✓	yes

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

https://maffcode.site/ via 2a00:15f8:a000:5:1:12:8:69c9 → 200

works

What's keeping maffcode.site from an A

Mail servers without IPv6
mx1.masterhost.ru 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

maffcode.site Has IPv6

A (IPv4)	90.156.201.76 90.156.201.36 90.156.201.35 90.156.201.102
AAAA (IPv6)	2a00:15f8:a000:5:1:12:8:69c9 2a00:15f8:a000:5:1:11:8:69c9 2a00:15f8:a000:5:1:14:8:69c9 2a00:15f8:a000:5:1:13:8:69c9

www.maffcode.site Has IPv6

A (IPv4)	90.156.201.102 90.156.201.35 90.156.201.76 90.156.201.36
AAAA (IPv6)	2a00:15f8:a000:5:1:14:8:69c9 2a00:15f8:a000:5:1:12:8:69c9 2a00:15f8:a000:5:1:11:8:69c9 2a00:15f8:a000:5:1:13:8:69c9

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: maffcode.site
Measured 2026-11-06 01:30:54 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    90.156.201.76, 90.156.201.36, 90.156.201.35, 90.156.201.102
AAAA (IPv6): 2a00:15f8:a000:5:1:12:8:69c9, 2a00:15f8:a000:5:1:11:8:69c9, 2a00:15f8:a000:5:1:14:8:69c9, 2a00:15f8:a000:5:1:13:8:69c9
www AAAA:    2a00:15f8:a000:5:1:14:8:69c9, 2a00:15f8:a000:5:1:12:8:69c9, 2a00:15f8:a000:5:1:11:8:69c9, 2a00:15f8:a000:5:1:13:8:69c9

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: maffcode.site has 4 IPv6 addresses and answers on every one we tested.
    2a00:15f8:a000:5:1:12:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:11:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:14:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:13:8:69c9: answers (TCP 443)
- www over IPv6: www.maffcode.site has 4 IPv6 addresses and answers on every one we tested.
    2a00:15f8:a000:5:1:14:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:12:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:11:8:69c9: answers (TCP 443)
    2a00:15f8:a000:5:1:13:8:69c9: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 3 of 3 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://maffcode.site/ via 2a00:15f8:a000:5:1:12:8:69c9 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/InbsrVYTuw

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

Checked 2026-11-06 01:30:54 UTC. Full DNS report: dns.pizza/domain/maffcode.site · Age, certificate and blocklists: how.is/maffcode.site · JSON: /api/v1/maffcode.site