Yes — uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org has IPv6.

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

This is a saved measurement from 2026-11-02 10:26 UTC. Check uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org live now

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org has an AAAA record and answers on it. ✓ 2001:8d8:100f:f000::200 answers · 443	yes
www over IPv6 www.uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org has an AAAA record and answers on it. ✓ 2001:8d8:105:1:0:1:0:6 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. mx00.ionos.com ✗mx01.ionos.com ✗	no
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1105.ui-dns.de ✓ns1079.ui-dns.org ✓ns1084.ui-dns.biz ✓ns1112.ui-dns.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).

https://uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org/ via 2001:8d8:100f:f000::200 · ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR

What's keeping uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org from an A

Mail servers without IPv6
mx00.ionos.com, mx01.ionos.com 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

uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org Has IPv6

A (IPv4)	217.160.0.225
AAAA (IPv6)	2001:8d8:100f:f000::200

www.uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org Has IPv6

A (IPv4)	212.227.172.251
AAAA (IPv6)	2001:8d8:105:1:0:1:0:6

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: uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org
Measured 2026-11-02 10:26:29 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    217.160.0.225
AAAA (IPv6): 2001:8d8:100f:f000::200
www AAAA:    2001:8d8:105:1:0:1:0:6

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org has an AAAA record and answers on it.
    2001:8d8:100f:f000::200: answers (TCP 443)
- www over IPv6: www.uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org has an AAAA record and answers on it.
    2001:8d8:105:1:0:1:0:6: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 4 of 4 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): uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).
    https://uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org/ via 2001:8d8:100f:f000::200 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/J3XkkMVREK

Permanent link: aaaa.bot/r/J3XkkMVREK · How we measure

Checked 2026-11-02 10:26:29 UTC. Full DNS report: dns.pizza/domain/uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org · Age, certificate and blocklists: how.is/uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org · JSON: /api/v1/uber-domain-verification4b1ffb76-f560-47b2-9316-f0dd6d3fbf16.org