Yes — carrefoursolucoes.com.br 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 carrefoursolucoes.com.br has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:a1b answers · 443✓ 2606:4700::6812:b1b answers · 443	yes
www over IPv6 www.carrefoursolucoes.com.br has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:a1b answers · 443✓ 2606:4700::6812:b1b answers · 443	yes
Mail servers (MX) have IPv6 At least one mail server has no AAAA record (0 of 10 checked do). smtp01.carrefoursolucoes.com.br ✗smtp05.carrefoursolucoes.com.br ✗smtp06.carrefoursolucoes.com.br ✗smtp07.carrefoursolucoes.com.br ✗smtp08.carrefoursolucoes.com.br ✗smtp10.carrefoursolucoes.com.br ✗smtp11.carrefoursolucoes.com.br ✗smtp12.carrefoursolucoes.com.br ✗smtp13.carrefoursolucoes.com.br ✗smtp14.carrefoursolucoes.com.br ✗	partly
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. sneh.ns.cloudflare.com ✓osmar.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.

https://carrefoursolucoes.com.br/ via 2606:4700::6812:a1b → 403

works

What's keeping carrefoursolucoes.com.br from an A

Mail servers without IPv6
smtp01.carrefoursolucoes.com.br, smtp05.carrefoursolucoes.com.br, smtp06.carrefoursolucoes.com.br, smtp07.carrefoursolucoes.com.br, smtp08.carrefoursolucoes.com.br, smtp10.carrefoursolucoes.com.br, smtp11.carrefoursolucoes.com.br, smtp12.carrefoursolucoes.com.br, smtp13.carrefoursolucoes.com.br, smtp14.carrefoursolucoes.com.br 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

carrefoursolucoes.com.br Has IPv6

A (IPv4)	104.18.10.27 104.18.11.27
AAAA (IPv6)	2606:4700::6812:a1b 2606:4700::6812:b1b

www.carrefoursolucoes.com.br Has IPv6

A (IPv4)	104.18.10.27 104.18.11.27
AAAA (IPv6)	2606:4700::6812:a1b 2606:4700::6812:b1b

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: carrefoursolucoes.com.br
Measured 2026-11-01 02:44:10 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.10.27, 104.18.11.27
AAAA (IPv6): 2606:4700::6812:a1b, 2606:4700::6812:b1b
www AAAA:    2606:4700::6812:a1b, 2606:4700::6812:b1b

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: carrefoursolucoes.com.br has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:a1b: answers (TCP 443)
    2606:4700::6812:b1b: answers (TCP 443)
- www over IPv6: www.carrefoursolucoes.com.br has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:a1b: answers (TCP 443)
    2606:4700::6812:b1b: answers (TCP 443)
- Mail servers (MX) have IPv6: At least one mail server has no AAAA record (0 of 10 checked do).
- 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: HTTP 403.
    https://carrefoursolucoes.com.br/ via 2606:4700::6812:a1b -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/w4p4mmzbLG

Permanent link: aaaa.bot/r/w4p4mmzbLG · How we measure

Checked 2026-11-01 02:44:10 UTC. Full DNS report: dns.pizza/domain/carrefoursolucoes.com.br · JSON: /api/v1/carrefoursolucoes.com.br