Yes — spinstein.app has IPv6.

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

This is a saved measurement from 2026-11-15 03:54 UTC. Check spinstein.app live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
spinstein.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3037::ac43:c904 answers · 443✓ 2606:4700:3035::6815:5511 answers · 443
yes
www over IPv6
www.spinstein.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3035::6815:5511 answers · 443✓ 2606:4700:3037::ac43:c904 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
_dc-mx.9fe535179871.spinstein.app ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
leif.ns.cloudflare.com ✓noor.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://spinstein.app/ via 2606:4700:3037::ac43:c904 → 200
works

What's keeping spinstein.app from an A

  1. Mail servers without IPv6
    _dc-mx.9fe535179871.spinstein.app has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

spinstein.app  Has IPv6

A (IPv4)172.67.201.4
104.21.85.17
AAAA (IPv6)2606:4700:3037::ac43:c904
2606:4700:3035::6815:5511

www.spinstein.app  Has IPv6

A (IPv4)104.21.85.17
172.67.201.4
AAAA (IPv6)2606:4700:3035::6815:5511
2606:4700:3037::ac43:c904

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/ddEBigc6mW · How we measure

Checked 2026-11-15 03:54:30 UTC. Full DNS report: dns.pizza/domain/spinstein.app · Age, certificate and blocklists: how.is/spinstein.app · JSON: /api/v1/spinstein.app