Yes — en.carioca.rio has IPv6.

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

Measured 2026-11-15 15:15 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check en.carioca.rio now

B
IPv6 readiness
Works over IPv6, with one gap: its nameservers lack IPv6.
Website over IPv6
en.carioca.rio has an AAAA record and answers on it.
✓ 2001:41d0:b01:5900:6::888 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
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
ns0.rio.gov.br ✗ns1.rio.rj.gov.br ✗
no

First measured 2026-11-15; last confirmed 2026-11-15.

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 402.
https://en.carioca.rio/ via 2001:41d0:b01:5900:6::888 → 402
works
 Which outside scripts, fonts, payments or chat en.carioca.rio loads from have no IPv6.
 Load en.carioca.rio over IPv6 from up to six other places — a second opinion.

What's keeping en.carioca.rio from an A

  1. Nameservers without IPv6
    ns0.rio.gov.br, ns1.rio.rj.gov.br all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

en.carioca.rio  Has IPv6

Alias ofkars.tdn.gtranslate.net
A (IPv4)64.7.195.16
AAAA (IPv6)2001:41d0:b01:5900:6::888

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/VJIxbHLWnm · How we measure

Checked 2026-11-15 15:15:44 UTC. Full DNS report: dns.pizza/domain/en.carioca.rio · Age, certificate and blocklists: how.is/en.carioca.rio · JSON: /api/v1/en.carioca.rio