Yes — mercadox.online has IPv6.

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

IPv6 readiness

Works over IPv6, with gaps: its mail servers lack IPv6; its nameservers lack IPv6.

Website over IPv6 mercadox.online has an AAAA record and answers on it. ✓ 2800:6c0:2::c:267 answers · 443	yes
www over IPv6 www.mercadox.online has an AAAA record and answers on it. ✓ 2800:6c0:2::c:267 answers · 443	yes
Mail servers (MX) have IPv6 At least one mail server has no AAAA record (1 of 2 checked do). mx1.mercadox.online ✗mail.mercadox.online ✓	partly
Nameservers have IPv6 No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS. ns3.hostmar.com ✗ns4.hostmar.com ✗	no

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

https://mercadox.online/ via 2800:6c0:2::c:267 → 200

works

What's keeping mercadox.online from an A

Mail servers without IPv6
mx1.mercadox.online has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.
Nameservers without IPv6
ns3.hostmar.com, ns4.hostmar.com 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

mercadox.online Has IPv6

A (IPv4)	200.58.111.92
AAAA (IPv6)	2800:6c0:2::c:267

www.mercadox.online Has IPv6

Alias of	mercadox.online
A (IPv4)	200.58.111.92
AAAA (IPv6)	2800:6c0:2::c:267

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: mercadox.online
Measured 2026-11-04 10:18:34 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    200.58.111.92
AAAA (IPv6): 2800:6c0:2::c:267
www AAAA:    2800:6c0:2::c:267

Readiness grade C: Works over IPv6, with gaps: its mail servers lack IPv6; its nameservers lack IPv6.
- Website over IPv6: mercadox.online has an AAAA record and answers on it.
    2800:6c0:2::c:267: answers (TCP 443)
- www over IPv6: www.mercadox.online has an AAAA record and answers on it.
    2800:6c0:2::c:267: answers (TCP 443)
- Mail servers (MX) have IPv6: At least one mail server has no AAAA record (1 of 2 checked do).
- Nameservers have IPv6: No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate: HTTP 200.
    https://mercadox.online/ via 2800:6c0:2::c:267 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/6WcKvohRIu

Permanent link: aaaa.bot/r/6WcKvohRIu · How we measure

Checked 2026-11-04 10:18:34 UTC. Full DNS report: dns.pizza/domain/mercadox.online · Age, certificate and blocklists: how.is/mercadox.online · JSON: /api/v1/mercadox.online