Yes — pubbi.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 pubbi.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26 answers · 443✓ 2a02:4780:84:d229:a4a2:3d5c:20a6:8038 answers · 443	yes
www over IPv6 www.pubbi.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:22:ea77:3ab8:223f:dd4a:da95 answers · 443✓ 2a02:4780:21:7237:89c2:5962:e333:76c7 answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. solar.dns-parking.com ✓lunar.dns-parking.com ✓	yes

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

https://pubbi.app/ via 2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26 → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/pubbi.app.svg)](https://aaaa.bot/pubbi.app)

Check again

pubbi.app Has IPv6

A (IPv4)	88.222.222.211 84.32.84.39
AAAA (IPv6)	2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26 2a02:4780:84:d229:a4a2:3d5c:20a6:8038

www.pubbi.app Has IPv6

Alias of	www.pubbi.app.cdn.hstgr.net
A (IPv4)	88.222.222.153 2.57.91.11
AAAA (IPv6)	2a02:4780:22:ea77:3ab8:223f:dd4a:da95 2a02:4780:21:7237:89c2:5962:e333:76c7

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: pubbi.app
Measured 2026-11-06 08:00:25 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    88.222.222.211, 84.32.84.39
AAAA (IPv6): 2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26, 2a02:4780:84:d229:a4a2:3d5c:20a6:8038
www AAAA:    2a02:4780:22:ea77:3ab8:223f:dd4a:da95, 2a02:4780:21:7237:89c2:5962:e333:76c7

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: pubbi.app has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26: answers (TCP 443)
    2a02:4780:84:d229:a4a2:3d5c:20a6:8038: answers (TCP 443)
- www over IPv6: www.pubbi.app has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:22:ea77:3ab8:223f:dd4a:da95: answers (TCP 443)
    2a02:4780:21:7237:89c2:5962:e333:76c7: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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://pubbi.app/ via 2a02:4780:84:8ce7:3ee1:c7fa:a8e6:3b26 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/XVeSQqDRWT

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

Checked 2026-11-06 08:00:25 UTC. Full DNS report: dns.pizza/domain/pubbi.app · Age, certificate and blocklists: how.is/pubbi.app · JSON: /api/v1/pubbi.app