Yes — citilabrc.online has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its nameservers lack IPv6.
Website over IPv6
citilabrc.online has an AAAA record and answers on it.
✓ 2a07:ab00:0:19::136 answers · 443
yes
www over IPv6
www.citilabrc.online has an AAAA record and answers on it.
✓ 2a07:ab00:0:19::136 answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
citilabrc.online ✓
yes
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
sd02a-ams.privatesystems.net ✗sd02b-ams.privatesystems.net ✗
no
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://citilabrc.online/ via 2a07:ab00:0:19::136 → 302https://citilabrc.online/login via 2a07:ab00:0:19::136 → 200
works
 Load citilabrc.online over IPv6 from up to six other places — a second opinion.

What's keeping citilabrc.online from an A

  1. Nameservers without IPv6
    sd02a-ams.privatesystems.net, sd02b-ams.privatesystems.net 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

citilabrc.online  Has IPv6

A (IPv4)209.42.198.234
AAAA (IPv6)2a07:ab00:0:19::136

www.citilabrc.online  Has IPv6

Alias ofcitilabrc.online
A (IPv4)209.42.198.234
AAAA (IPv6)2a07:ab00:0:19::136

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/Tl4Gm0nzFP · How we measure

Checked 2026-10-31 12:13:37 UTC. Full DNS report: dns.pizza/domain/citilabrc.online · JSON: /api/v1/citilabrc.online