Yes — caixabanknow.digital has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 caixabanknow.digital has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::ac43:c981 answers · 443✓ 2606:4700:3032::6815:3cd3 answers · 443	yes
www over IPv6 www.caixabanknow.digital has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:3cd3 answers · 443✓ 2606:4700:3033::ac43:c981 answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. braden.ns.cloudflare.com ✓elly.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Redirects to app.caixabanknow.digital, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.

https://caixabanknow.digital/ via 2606:4700:3033::ac43:c981 → 302https://app.caixabanknow.digital/?error=404&ref=true&t=20261103110625&ip=2605:4c40:40:f110::b04c&port=0 · redirects to app.caixabanknow.digital, which has no IPv6 address

problem

Nothing keeping you from an A

A redirect leads off IPv6
Redirects to app.caixabanknow.digital, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.

Check again

caixabanknow.digital Has IPv6

A (IPv4)	172.67.201.129 104.21.60.211
AAAA (IPv6)	2606:4700:3033::ac43:c981 2606:4700:3032::6815:3cd3

www.caixabanknow.digital Has IPv6

A (IPv4)	172.67.201.129 104.21.60.211
AAAA (IPv6)	2606:4700:3032::6815:3cd3 2606:4700:3033::ac43:c981

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: caixabanknow.digital
Measured 2026-11-03 08:06:24 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.201.129, 104.21.60.211
AAAA (IPv6): 2606:4700:3033::ac43:c981, 2606:4700:3032::6815:3cd3
www AAAA:    2606:4700:3032::6815:3cd3, 2606:4700:3033::ac43:c981

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: caixabanknow.digital has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::ac43:c981: answers (TCP 443)
    2606:4700:3032::6815:3cd3: answers (TCP 443)
- www over IPv6: www.caixabanknow.digital has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:3cd3: answers (TCP 443)
    2606:4700:3033::ac43:c981: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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): Redirects to app.caixabanknow.digital, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
    https://caixabanknow.digital/ via 2606:4700:3033::ac43:c981 -> HTTP 302, certificate: valid
    https://app.caixabanknow.digital/?error=404&ref=true&t=20261103110625&ip=2605:4c40:40:f110::b04c&port=0 (redirects to app.caixabanknow.digital, which has no IPv6 address)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/N1HQ3UUgPv

Permanent link: aaaa.bot/r/N1HQ3UUgPv · How we measure

Checked 2026-11-03 08:06:24 UTC. Full DNS report: dns.pizza/domain/caixabanknow.digital · Age, certificate and blocklists: how.is/caixabanknow.digital · JSON: /api/v1/caixabanknow.digital