Yes — santanderfinance.online 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
santanderfinance.online 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.co.uk ✗mx00.ionos.co.uk ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1118.ui-dns.de ✓ns1041.ui-dns.biz ✓ns1083.ui-dns.com ✓ns1027.ui-dns.org ✓
yes
HTTPS over IPv6 · not part of the grade yet
santanderfinance.online didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).
https://santanderfinance.online/ via 2001:8d8:100f:f000::200 · ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR
?
 Which outside scripts, fonts, payments or chat santanderfinance.online loads from have no IPv6.
 Load santanderfinance.online over IPv6 from up to six other places — a second opinion.

What's keeping santanderfinance.online from an A

  1. Mail servers without IPv6
    mx01.ionos.co.uk, mx00.ionos.co.uk 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

santanderfinance.online  Has IPv6

A (IPv4)217.160.0.96
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/2ZGRuVN3uq · How we measure

Checked 2026-11-07 20:06:10 UTC. Full DNS report: dns.pizza/domain/santanderfinance.online · Age, certificate and blocklists: how.is/santanderfinance.online · JSON: /api/v1/santanderfinance.online