Yes — fpxcompliance.app has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 fpxcompliance.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:cd63 answers · 443✓ 2606:4700:3037::6815:3d1a answers · 443	yes
www over IPv6 www.fpxcompliance.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::6815:3d1a answers · 443✓ 2606:4700:3037::ac43:cd63 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. in1-smtp.messagingengine.com ✗in2-smtp.messagingengine.com ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. trevor.ns.cloudflare.com ✓zara.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://fpxcompliance.app/ via 2606:4700:3037::ac43:cd63 → 307https://fpxcompliance.app/login via 2606:4700:3037::ac43:cd63 → 200

works

What's keeping fpxcompliance.app from an A

Mail servers without IPv6
in1-smtp.messagingengine.com, in2-smtp.messagingengine.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

fpxcompliance.app Has IPv6

A (IPv4)	104.21.61.26 172.67.205.99
AAAA (IPv6)	2606:4700:3037::ac43:cd63 2606:4700:3037::6815:3d1a

www.fpxcompliance.app Has IPv6

A (IPv4)	172.67.205.99 104.21.61.26
AAAA (IPv6)	2606:4700:3037::6815:3d1a 2606:4700:3037::ac43:cd63

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

IPv6 measurement: fpxcompliance.app
Measured 2026-11-11 03:20:48 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.61.26, 172.67.205.99
AAAA (IPv6): 2606:4700:3037::ac43:cd63, 2606:4700:3037::6815:3d1a
www AAAA:    2606:4700:3037::6815:3d1a, 2606:4700:3037::ac43:cd63

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: fpxcompliance.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:cd63: answers (TCP 443)
    2606:4700:3037::6815:3d1a: answers (TCP 443)
- www over IPv6: www.fpxcompliance.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::6815:3d1a: answers (TCP 443)
    2606:4700:3037::ac43:cd63: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
    https://fpxcompliance.app/ via 2606:4700:3037::ac43:cd63 -> HTTP 307, certificate: valid
    https://fpxcompliance.app/login via 2606:4700:3037::ac43:cd63 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/bZ2mwAxvue

Permanent link: aaaa.bot/r/bZ2mwAxvue · How we measure

Checked 2026-11-11 03:20:48 UTC. Full DNS report: dns.pizza/domain/fpxcompliance.app · Age, certificate and blocklists: how.is/fpxcompliance.app · JSON: /api/v1/fpxcompliance.app