Yes — printerio.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 printerio.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::ac43:d8d0 answers · 443✓ 2606:4700:3031::6815:10e6 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. aisha.ns.cloudflare.com ✓jonah.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://printerio.app/ via 2606:4700:3035::ac43:d8d0 → 302https://eponude.cloudflareaccess.com/cdn-cgi/access/login/printerio.app?kid=0cc9a0e6f3cf945b4a91403ce6fab7ccb5dae895192705b842badb52a2685dc8&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImI2MGNiNTRlM2FiZmYwMDg1NTk0NmQ2MTA1OGZjYjNhNmEzY2Q5NDkwZTA3MDkxZDMwNjNjNTc4ODFiYzBiZjQifQ.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.utlAzIct-tDCERiVPTAJUMh9BV9-ohDz-qKcBu5sWAMMmBZYvQc1qy3tBudBy1-7kExP0CIeywmBnxdF8XBQYvJks3gK4CznJcUnhjvHbD26mCtPGHig2RtOaRhBD5O0baNIq3pYOtxAX0QZkHiFXZGXLayTB0utm5mly_yjcpogw2pAGOWR3mJwhHDVtWpNRRiPsuwirzT8rFC6Cil55cQPAFFLXfY1HR5awC-UkPFY8OhgccZqfL1a8NCtr-4ECTbz38ZxY6tx1ntCbghShj0LYvld1jii5GaQIeBnMCjYnG8oWtExkW--9N_PD8d6S505gP3S-HRYRbNlTtxF7w&redirect_url=%2F via 2606:4700:300a::6813:c21d → 200

works

Nothing keeping you from an A

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

Check again

printerio.app Has IPv6

A (IPv4)	104.21.16.230 172.67.216.208
AAAA (IPv6)	2606:4700:3035::ac43:d8d0 2606:4700:3031::6815:10e6

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: printerio.app
Measured 2026-11-14 05:34:22 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.16.230, 172.67.216.208
AAAA (IPv6): 2606:4700:3035::ac43:d8d0, 2606:4700:3031::6815:10e6

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: printerio.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::ac43:d8d0: answers (TCP 443)
    2606:4700:3031::6815:10e6: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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://printerio.app/ via 2606:4700:3035::ac43:d8d0 -> HTTP 302, certificate: valid
    https://eponude.cloudflareaccess.com/cdn-cgi/access/login/printerio.app?kid=0cc9a0e6f3cf945b4a91403ce6fab7ccb5dae895192705b842badb52a2685dc8&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImI2MGNiNTRlM2FiZmYwMDg1NTk0NmQ2MTA1OGZjYjNhNmEzY2Q5NDkwZTA3MDkxZDMwNjNjNTc4ODFiYzBiZjQifQ.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.utlAzIct-tDCERiVPTAJUMh9BV9-ohDz-qKcBu5sWAMMmBZYvQc1qy3tBudBy1-7kExP0CIeywmBnxdF8XBQYvJks3gK4CznJcUnhjvHbD26mCtPGHig2RtOaRhBD5O0baNIq3pYOtxAX0QZkHiFXZGXLayTB0utm5mly_yjcpogw2pAGOWR3mJwhHDVtWpNRRiPsuwirzT8rFC6Cil55cQPAFFLXfY1HR5awC-UkPFY8OhgccZqfL1a8NCtr-4ECTbz38ZxY6tx1ntCbghShj0LYvld1jii5GaQIeBnMCjYnG8oWtExkW--9N_PD8d6S505gP3S-HRYRbNlTtxF7w&redirect_url=%2F via 2606:4700:300a::6813:c21d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/BXSYS_Dz67

Permanent link: aaaa.bot/r/BXSYS_Dz67 · How we measure

Checked 2026-11-14 05:34:22 UTC. Full DNS report: dns.pizza/domain/printerio.app · Age, certificate and blocklists: how.is/printerio.app · JSON: /api/v1/printerio.app