Yes — open-source-cloud-center.dev has IPv6.

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

This is a saved measurement from 2026-10-31 07:48 UTC. Check open-source-cloud-center.dev live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 open-source-cloud-center.dev has an AAAA record and answers on it. ✓ 2a01:4f8:1c1d:e15::1 answers · 443	yes
www over IPv6 www.open-source-cloud-center.dev has an AAAA record and answers on it. ✓ 2a01:4f8:1c1d:e15::1 answers · 443	yes
Mail servers (MX) have IPv6 Null MX — this domain says it doesn't receive mail.	n/a
Nameservers have IPv6 3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1.domaindiscount24.net ✓ns2.domaindiscount24.net ✓ns3.domaindiscount24.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
The certificate served over IPv6 at 2a01:4f8:1c1d:e15::1 isn't valid for open-source-cloud-center.dev: UNABLE_TO_VERIFY_LEAF_SIGNATURE.

https://open-source-cloud-center.dev/ via 2a01:4f8:1c1d:e15::1 · UNABLE_TO_VERIFY_LEAF_SIGNATURE

problem

Nothing keeping you from an A

The certificate served over IPv6 is wrong
The certificate served over IPv6 at 2a01:4f8:1c1d:e15::1 isn't valid for open-source-cloud-center.dev: UNABLE_TO_VERIFY_LEAF_SIGNATURE. Often the IPv6 address points at a different server (or an old one) than IPv4 does. Make sure 2a01:4f8:1c1d:e15::1 serves the same certificate as your IPv4 address.

Check again

open-source-cloud-center.dev Has IPv6

A (IPv4)	167.235.107.35
AAAA (IPv6)	2a01:4f8:1c1d:e15::1

www.open-source-cloud-center.dev Has IPv6

A (IPv4)	167.235.107.35
AAAA (IPv6)	2a01:4f8:1c1d:e15::1

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: open-source-cloud-center.dev
Measured 2026-10-31 07:48:41 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    167.235.107.35
AAAA (IPv6): 2a01:4f8:1c1d:e15::1
www AAAA:    2a01:4f8:1c1d:e15::1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: open-source-cloud-center.dev has an AAAA record and answers on it.
    2a01:4f8:1c1d:e15::1: answers (TCP 443)
- www over IPv6: www.open-source-cloud-center.dev has an AAAA record and answers on it.
    2a01:4f8:1c1d:e15::1: answers (TCP 443)
- Mail servers (MX) have IPv6: Null MX — this domain says it doesn't receive mail.
- 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): The certificate served over IPv6 at 2a01:4f8:1c1d:e15::1 isn't valid for open-source-cloud-center.dev: UNABLE_TO_VERIFY_LEAF_SIGNATURE.
    https://open-source-cloud-center.dev/ via 2a01:4f8:1c1d:e15::1, certificate: UNABLE_TO_VERIFY_LEAF_SIGNATURE
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/nUkPhOf-_k

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

Checked 2026-10-31 07:48:41 UTC. Full DNS report: dns.pizza/domain/open-source-cloud-center.dev · JSON: /api/v1/open-source-cloud-center.dev