Has both IPv4 (A) and IPv6 (AAAA) addresses.
| Website over IPv6 cyber-security.icu has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:3ea0 answers · 443✓ 2606:4700:3035::ac43:8914 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 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ezra.ns.cloudflare.com ✓summer.ns.cloudflare.com ✓ | yes |
| HTTPS over IPv6 · not part of the grade yet Loads over IPv6 with a valid certificate: HTTP 200. https://cyber-security.icu/ via 2606:4700:3031::6815:3ea0 → 200 | works |
cyber-security.icu Has IPv6
| A (IPv4) | 172.67.137.20 104.21.62.160 |
|---|---|
| AAAA (IPv6) | 2606:4700:3031::6815:3ea0 2606:4700:3035::ac43:8914 |
Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).
Permanent link: aaaa.bot/r/Q-TR8Lkopp · How we measure
Checked 2026-11-11 17:03:47 UTC. Full DNS report: dns.pizza/domain/cyber-security.icu · Age, certificate and blocklists: how.is/cyber-security.icu · JSON: /api/v1/cyber-security.icu