Yes — cerno.cloud has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 cerno.cloud has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:64de:535e:b767:2009:57ef answers · 443✓ 2a02:4780:84:7155:97a6:fdb1:69bc:43c answers · 443	yes
www over IPv6 www.cerno.cloud has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:22:42b0:8308:704c:53a2:84e1 answers · 443✓ 2a02:4780:1d:6ec5:1383:45a0:f36d:66f1 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. lunar.dns-parking.com ✓solar.dns-parking.com ✓	yes

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

https://cerno.cloud/ via 2a02:4780:84:64de:535e:b767:2009:57ef → 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/cerno.cloud.svg)](https://aaaa.bot/cerno.cloud)

Check again

cerno.cloud Has IPv6

A (IPv4)	84.32.84.35 2.57.91.7
AAAA (IPv6)	2a02:4780:84:64de:535e:b767:2009:57ef 2a02:4780:84:7155:97a6:fdb1:69bc:43c

www.cerno.cloud Has IPv6

Alias of	www.cerno.cloud.cdn.hstgr.net
A (IPv4)	212.1.212.36 191.96.144.56
AAAA (IPv6)	2a02:4780:22:42b0:8308:704c:53a2:84e1 2a02:4780:1d:6ec5:1383:45a0:f36d:66f1

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: cerno.cloud
Measured 2026-11-13 16:51:25 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    84.32.84.35, 2.57.91.7
AAAA (IPv6): 2a02:4780:84:64de:535e:b767:2009:57ef, 2a02:4780:84:7155:97a6:fdb1:69bc:43c
www AAAA:    2a02:4780:22:42b0:8308:704c:53a2:84e1, 2a02:4780:1d:6ec5:1383:45a0:f36d:66f1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: cerno.cloud has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:64de:535e:b767:2009:57ef: answers (TCP 443)
    2a02:4780:84:7155:97a6:fdb1:69bc:43c: answers (TCP 443)
- www over IPv6: www.cerno.cloud has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:22:42b0:8308:704c:53a2:84e1: answers (TCP 443)
    2a02:4780:1d:6ec5:1383:45a0:f36d:66f1: 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://cerno.cloud/ via 2a02:4780:84:64de:535e:b767:2009:57ef -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/iHnGi3MGZY

Permanent link: aaaa.bot/r/iHnGi3MGZY · How we measure

Checked 2026-11-13 16:51:25 UTC. Full DNS report: dns.pizza/domain/cerno.cloud · Age, certificate and blocklists: how.is/cerno.cloud · JSON: /api/v1/cerno.cloud