Yes — gcdn.co has IPv6.

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

This is a saved measurement from 2026-10-31 02:46 UTC. Check gcdn.co live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 gcdn.co has an AAAA record and answers on it. ✓ 2a03:90c0:9997::9997 answers · 443	yes
www over IPv6 www.gcdn.co has an AAAA record and answers on it. ✓ 2a03:90c0:9996::9996 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mail.gcdn.co ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. gns2.gcdn.co ✓gns1.gcdn.co ✓	yes

HTTPS over IPv6 · not part of the grade yet
gcdn.co didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).

https://gcdn.co/ via 2a03:90c0:9997::9997 · ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/gcdn.co.svg)](https://aaaa.bot/gcdn.co)

Check again

gcdn.co Has IPv6

A (IPv4)	92.223.97.97
AAAA (IPv6)	2a03:90c0:9997::9997

www.gcdn.co Has IPv6

A (IPv4)	92.38.145.145
AAAA (IPv6)	2a03:90c0:9996::9996

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: gcdn.co
Measured 2026-10-31 02:46:28 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    92.223.97.97
AAAA (IPv6): 2a03:90c0:9997::9997
www AAAA:    2a03:90c0:9996::9996

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: gcdn.co has an AAAA record and answers on it.
    2a03:90c0:9997::9997: answers (TCP 443)
- www over IPv6: www.gcdn.co has an AAAA record and answers on it.
    2a03:90c0:9996::9996: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server 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): gcdn.co didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).
    https://gcdn.co/ via 2a03:90c0:9997::9997 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/BNwV7Qf6a_

Permanent link: aaaa.bot/r/BNwV7Qf6a_ · How we measure

Checked 2026-10-31 02:46:28 UTC. Full DNS report: dns.pizza/domain/gcdn.co · JSON: /api/v1/gcdn.co