Yes — cdn.locker has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
cdn.locker has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3033::ac43:d890 answers · 443✓ 2606:4700:3036::6815:5649 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.
ace.ns.cloudflare.com ✓sasha.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://cdn.locker/ via 2606:4700:3033::ac43:d890 → 303https://cdn.locker/login via 2606:4700:3033::ac43:d890 → 200
works
 Which outside scripts, fonts, payments or chat cdn.locker loads from have no IPv6.
 Load cdn.locker over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

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

Check again

cdn.locker  Has IPv6

A (IPv4)104.21.86.73
172.67.216.144
AAAA (IPv6)2606:4700:3033::ac43:d890
2606:4700:3036::6815:5649

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/RHsu9f70fr · How we measure

Checked 2026-11-11 07:42:20 UTC. Full DNS report: dns.pizza/domain/cdn.locker · Age, certificate and blocklists: how.is/cdn.locker · JSON: /api/v1/cdn.locker