Yes — ctihub.org has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 ctihub.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::6815:5d15 answers · 443✓ 2606:4700:3033::ac43:cb03 answers · 443	yes
www over IPv6 www.ctihub.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::6815:5d15 answers · 443✓ 2606:4700:3033::ac43:cb03 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mx1.hostinger.com ✓mx2.hostinger.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. reza.ns.cloudflare.com ✓wesley.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://ctihub.org/ via 2606:4700:3030::6815:5d15 → 302https://round-pine-ec69.cloudflareaccess.com/cdn-cgi/access/login/ctihub.org?kid=1d5329b3fe79328172907f23e55a24e044d7f80d42494554265d985d77fe1d9b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.cmFj_DNHGHpQQ4vKYy7E_DP3nD2zxVVqEYGzfdFc7U2tx4b5wYjth02WgVIyxXAKEI7UHHgJaU57g90zo_r4CBr2HGmkvr7GTWkCf8ZooTNj_gwizojyK0BYsVwG0gwyl3HzM1iVa_3fn8c3JvSbCa9DxFA8N1Dcgp6nAaAP-2CB34ineV1APIpxQMshkorbCvcbUdGj478W2gXCbqSYrWewjyxK-AYW9Iov8ZjvaBgSTkyzVM1Kq5UsDshh9JYc47N3z5m4928asS0-JYZ3DOcQ-QniCZAXes16n6WUnjiWeWbsWGFf7q4ePRNjLwDJZxOv1zQPCEPF0xDQBKq2PA&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

Nothing keeping you from an A

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

Check again

ctihub.org Has IPv6

A (IPv4)	104.21.93.21 172.67.203.3
AAAA (IPv6)	2606:4700:3030::6815:5d15 2606:4700:3033::ac43:cb03

www.ctihub.org Has IPv6

A (IPv4)	104.21.93.21 172.67.203.3
AAAA (IPv6)	2606:4700:3030::6815:5d15 2606:4700:3033::ac43:cb03

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: ctihub.org
Measured 2026-11-10 23:06:00 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.93.21, 172.67.203.3
AAAA (IPv6): 2606:4700:3030::6815:5d15, 2606:4700:3033::ac43:cb03
www AAAA:    2606:4700:3030::6815:5d15, 2606:4700:3033::ac43:cb03

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: ctihub.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::6815:5d15: answers (TCP 443)
    2606:4700:3033::ac43:cb03: answers (TCP 443)
- www over IPv6: www.ctihub.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::6815:5d15: answers (TCP 443)
    2606:4700:3033::ac43:cb03: 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): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://ctihub.org/ via 2606:4700:3030::6815:5d15 -> HTTP 302, certificate: valid
    https://round-pine-ec69.cloudflareaccess.com/cdn-cgi/access/login/ctihub.org?kid=1d5329b3fe79328172907f23e55a24e044d7f80d42494554265d985d77fe1d9b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.cmFj_DNHGHpQQ4vKYy7E_DP3nD2zxVVqEYGzfdFc7U2tx4b5wYjth02WgVIyxXAKEI7UHHgJaU57g90zo_r4CBr2HGmkvr7GTWkCf8ZooTNj_gwizojyK0BYsVwG0gwyl3HzM1iVa_3fn8c3JvSbCa9DxFA8N1Dcgp6nAaAP-2CB34ineV1APIpxQMshkorbCvcbUdGj478W2gXCbqSYrWewjyxK-AYW9Iov8ZjvaBgSTkyzVM1Kq5UsDshh9JYc47N3z5m4928asS0-JYZ3DOcQ-QniCZAXes16n6WUnjiWeWbsWGFf7q4ePRNjLwDJZxOv1zQPCEPF0xDQBKq2PA&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/g53f6cfTwn

Permanent link: aaaa.bot/r/g53f6cfTwn · How we measure

Checked 2026-11-10 23:06:00 UTC. Full DNS report: dns.pizza/domain/ctihub.org · Age, certificate and blocklists: how.is/ctihub.org · JSON: /api/v1/ctihub.org