Yes — americanexpressconcierge.net has IPv6.

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

This is a saved measurement from 2026-10-31 07:08 UTC. Check americanexpressconcierge.net live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
americanexpressconcierge.net has an AAAA record and answers on it.
✓ 2607:f1c0:100f:f000::2b9 answers · 443
yes
www over IPv6
www.americanexpressconcierge.net has an AAAA record and answers on it.
✓ 2607:f1c0:100f:f000::2b9 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.
ns1024.ui-dns.de ✓ns1039.ui-dns.org ✓ns1061.ui-dns.biz ✓ns1106.ui-dns.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://americanexpressconcierge.net/ via 2607:f1c0:100f:f000::2b9 → 200
works

What's keeping americanexpressconcierge.net from an A

  1. 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

americanexpressconcierge.net  Has IPv6

A (IPv4)74.208.236.184
AAAA (IPv6)2607:f1c0:100f:f000::2b9

www.americanexpressconcierge.net  Has IPv6

A (IPv4)74.208.236.184
AAAA (IPv6)2607:f1c0:100f:f000::2b9

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/WW21oK8nwI · How we measure

Checked 2026-10-31 07:08:10 UTC. Full DNS report: dns.pizza/domain/americanexpressconcierge.net · JSON: /api/v1/americanexpressconcierge.net