Yes — henrycrosenberg.com has IPv6.

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

C
IPv6 readiness
Works over IPv6, with gaps: www doesn't fully work over IPv6; its mail servers lack IPv6.
Website over IPv6
henrycrosenberg.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3030::6815:4287 answers · 443✓ 2606:4700:3030::ac43:a065 answers · 443
yes
www over IPv6
www.henrycrosenberg.com has no AAAA record.		no
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx01.mail.icloud.com ✗mx02.mail.icloud.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ruben.ns.cloudflare.com ✓jasmine.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://henrycrosenberg.com/ via 2606:4700:3030::6815:4287 → 403
works
 Load henrycrosenberg.com over IPv6 from up to six other places — a second opinion.

What's keeping henrycrosenberg.com from an A

  1. Add IPv6 for www.henrycrosenberg.com
    www.henrycrosenberg.com has no AAAA record. Get www's IPv6 address from whoever hosts www and add it as an AAAA record. If the same server already serves both names (and its certificate covers www), you can reuse henrycrosenberg.com's AAAA record(s) for www. How to add an AAAA record
  2. Mail servers without IPv6
    mx01.mail.icloud.com, mx02.mail.icloud.com 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.

Check again

henrycrosenberg.com  Has IPv6

A (IPv4)104.21.66.135
172.67.160.101
AAAA (IPv6)2606:4700:3030::6815:4287
2606:4700:3030::ac43:a065

www.henrycrosenberg.com  No address

A (IPv4)none
AAAA (IPv6)none

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/xspJpkdFC6 · How we measure

Checked 2026-11-01 00:51:50 UTC. Full DNS report: dns.pizza/domain/henrycrosenberg.com · JSON: /api/v1/henrycrosenberg.com