Yes — xn--schlsselnotdienst-rhein-ruhr-46c.com has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
xn--schlsselnotdienst-rhein-ruhr-46c.com has an AAAA record and answers on it.
✓ 2001:8d8:100f:f000::200 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx01.ionos.de ✗mx00.ionos.de ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1064.ui-dns.de ✓ns1096.ui-dns.biz ✓ns1060.ui-dns.com ✓ns1061.ui-dns.org ✓
yes
HTTPS over IPv6 · not part of the grade yet
xn--schlsselnotdienst-rhein-ruhr-46c.com didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).
https://xn--schlsselnotdienst-rhein-ruhr-46c.com/ via 2001:8d8:100f:f000::200 · ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR
?
 Load xn--schlsselnotdienst-rhein-ruhr-46c.com over IPv6 from up to six other places — a second opinion.

What's keeping xn--schlsselnotdienst-rhein-ruhr-46c.com from an A

  1. Mail servers without IPv6
    mx01.ionos.de, mx00.ionos.de 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

xn--schlsselnotdienst-rhein-ruhr-46c.com  Has IPv6

A (IPv4)217.160.0.62
AAAA (IPv6)2001:8d8:100f:f000::200

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

 Permanent link: aaaa.bot/r/40i3sEUqiH · How we measure

Checked 2026-11-04 00:32:43 UTC. Full DNS report: dns.pizza/domain/xn--schlsselnotdienst-rhein-ruhr-46c.com · Age, certificate and blocklists: how.is/xn--schlsselnotdienst-rhein-ruhr-46c.com · JSON: /api/v1/xn--schlsselnotdienst-rhein-ruhr-46c.com