Yes — ulsterbank.global has IPv6.

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

IPv6 readiness

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

Website over IPv6 ulsterbank.global has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:80b7 answers · 443✓ 2606:4700:3034::6815:232 answers · 443	yes
www over IPv6 www.ulsterbank.global has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:232 answers · 443✓ 2606:4700:3037::ac43:80b7 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 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. evelyn.ns.cloudflare.com ✓jose.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://ulsterbank.global/ via 2606:4700:3037::ac43:80b7 → 303https://ulsterbank.global/login via 2606:4700:3037::ac43:80b7 → 200

works

What's keeping ulsterbank.global 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

ulsterbank.global Has IPv6

A (IPv4)	172.67.128.183 104.21.2.50
AAAA (IPv6)	2606:4700:3037::ac43:80b7 2606:4700:3034::6815:232

www.ulsterbank.global Has IPv6

A (IPv4)	172.67.128.183 104.21.2.50
AAAA (IPv6)	2606:4700:3034::6815:232 2606:4700:3037::ac43:80b7

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: ulsterbank.global
Measured 2026-11-06 08:19:41 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.128.183, 104.21.2.50
AAAA (IPv6): 2606:4700:3037::ac43:80b7, 2606:4700:3034::6815:232
www AAAA:    2606:4700:3034::6815:232, 2606:4700:3037::ac43:80b7

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: ulsterbank.global has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:80b7: answers (TCP 443)
    2606:4700:3034::6815:232: answers (TCP 443)
- www over IPv6: www.ulsterbank.global has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:232: answers (TCP 443)
    2606:4700:3037::ac43:80b7: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers 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 after 1 redirect: HTTP 200.
    https://ulsterbank.global/ via 2606:4700:3037::ac43:80b7 -> HTTP 303, certificate: valid
    https://ulsterbank.global/login via 2606:4700:3037::ac43:80b7 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/RSps1a4hL6

Permanent link: aaaa.bot/r/RSps1a4hL6 · How we measure

Checked 2026-11-06 08:19:41 UTC. Full DNS report: dns.pizza/domain/ulsterbank.global · Age, certificate and blocklists: how.is/ulsterbank.global · JSON: /api/v1/ulsterbank.global