Yes — opencarrier.dev has IPv6.

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

This is a saved measurement from 2026-11-01 19:21 UTC. Check opencarrier.dev live now

C
IPv6 readiness
Works over IPv6, with gaps: its mail servers lack IPv6; its nameservers lack IPv6.
Website over IPv6
opencarrier.dev has 4 IPv6 addresses and answers on every one we tested.
✓ 2606:50c0:8000::153 answers · 443✓ 2606:50c0:8001::153 answers · 443✓ 2606:50c0:8002::153 answers · 443✓ 2606:50c0:8003::153 answers · 443
yes
www over IPv6
www.opencarrier.dev has 4 IPv6 addresses and answers on every one we tested.
✓ 2606:50c0:8000::153 answers · 443✓ 2606:50c0:8001::153 answers · 443✓ 2606:50c0:8002::153 answers · 443✓ 2606:50c0:8003::153 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mxa.mailgun.org ✗mxb.mailgun.org ✗
no
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
nsc1.squarespacedns.com ✗nsc2.squarespacedns.com ✗nsc3.squarespacedns.com ✗nsc4.squarespacedns.com ✗
no
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://opencarrier.dev/ via 2606:50c0:8000::153 → 200
works

What's keeping opencarrier.dev from an A

  1. Mail servers without IPv6
    mxa.mailgun.org, mxb.mailgun.org have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.
  2. Nameservers without IPv6
    nsc1.squarespacedns.com, nsc2.squarespacedns.com, nsc3.squarespacedns.com, nsc4.squarespacedns.com 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

opencarrier.dev  Has IPv6

A (IPv4)185.199.108.153
185.199.109.153
185.199.110.153
185.199.111.153
AAAA (IPv6)2606:50c0:8000::153
2606:50c0:8001::153
2606:50c0:8002::153
2606:50c0:8003::153

www.opencarrier.dev  Has IPv6

Alias ofappliedsymbolics.github.io
A (IPv4)185.199.108.153
185.199.109.153
185.199.110.153
185.199.111.153
AAAA (IPv6)2606:50c0:8000::153
2606:50c0:8001::153
2606:50c0:8002::153
2606:50c0:8003::153

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/KGJlv--Pe9 · How we measure

Checked 2026-11-01 19:21:13 UTC. Full DNS report: dns.pizza/domain/opencarrier.dev · JSON: /api/v1/opencarrier.dev