Yes — simpleteacher.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 simpleteacher.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::ac43:c705 answers · 443✓ 2606:4700:3033::6815:2a13 answers · 443	yes
www over IPv6 www.simpleteacher.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::ac43:c705 answers · 443✓ 2606:4700:3033::6815:2a13 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. diva.ns.cloudflare.com ✓ernest.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://simpleteacher.app/ via 2606:4700:3034::ac43:c705 → 302https://komodo-products.cloudflareaccess.com/cdn-cgi/access/login/simpleteacher.app?kid=b1b5622f44e2009345e19dd5b359d2e977c86dfc7a69d8a5e949b7127dbf76f8&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.SCM0oogSeLLtaGlKim8FRBNdCQhACprvwfmMkcncOFx0--BkDsy3o8n4z0Mu-9hcawKsYvEFV-OEibLaa0pD6PbppU1u_g8kGTRPp28PS1JPejAto6TDjn3mVCBndz2fJlzRk8gRUPvmD4Fp0FyoONlozPNzu18YyVuXSrvlgL1Nxqbv7FEju6yQYseVf-AoOG_4O9whPoUsOc9or0Bl3XEVm5oFeIC1eLUh_PoJFTwH9lYwW92bn6euYVQ-2eBYQ32P926GYE9Gj03urO5n6hF6igI-C-GinzI2hCMojPDYSYjV7mX26hVlrq2TpMzyngYeP39RSbQ1M4Zila9l3g&redirect_url=%2F via 2606:4700:300a::6813:c31d → 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/simpleteacher.app.svg)](https://aaaa.bot/simpleteacher.app)

Check again

simpleteacher.app Has IPv6

A (IPv4)	104.21.42.19 172.67.199.5
AAAA (IPv6)	2606:4700:3034::ac43:c705 2606:4700:3033::6815:2a13

www.simpleteacher.app Has IPv6

A (IPv4)	172.67.199.5 104.21.42.19
AAAA (IPv6)	2606:4700:3034::ac43:c705 2606:4700:3033::6815:2a13

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: simpleteacher.app
Measured 2026-11-06 01:34:30 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.42.19, 172.67.199.5
AAAA (IPv6): 2606:4700:3034::ac43:c705, 2606:4700:3033::6815:2a13
www AAAA:    2606:4700:3034::ac43:c705, 2606:4700:3033::6815:2a13

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: simpleteacher.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::ac43:c705: answers (TCP 443)
    2606:4700:3033::6815:2a13: answers (TCP 443)
- www over IPv6: www.simpleteacher.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::ac43:c705: answers (TCP 443)
    2606:4700:3033::6815:2a13: 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://simpleteacher.app/ via 2606:4700:3034::ac43:c705 -> HTTP 302, certificate: valid
    https://komodo-products.cloudflareaccess.com/cdn-cgi/access/login/simpleteacher.app?kid=b1b5622f44e2009345e19dd5b359d2e977c86dfc7a69d8a5e949b7127dbf76f8&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6ImIxYjU2MjJmNDRlMjAwOTM0NWUxOWRkNWIzNTlkMmU5NzdjODZkZmM3YTY5ZDhhNWU5NDliNzEyN2RiZjc2ZjgiLCJob3N0bmFtZSI6InNpbXBsZXRlYWNoZXIuYXBwIiwicmVkaXJlY3RfdXJsIjoiLyIsInNlcnZpY2VfdG9rZW5fc3RhdHVzIjpmYWxzZSwiaXNfd2FycCI6ZmFsc2UsImlzX2dhdGV3YXkiOmZhbHNlLCJleHAiOjE3OTM5MjkxNzAsIm5iZiI6MTc5MzkyODg3MCwiaWF0IjoxNzkzOTI4ODcwLCJhdXRoX3N0YXR1cyI6Ik5PTkUiLCJtdGxzX2F1dGgiOnsiY2VydF9pc3N1ZXJfZG4iOiIiLCJjZXJ0X3NlcmlhbCI6IiIsImNlcnRfaXNzdWVyX3NraSI6IiIsImNlcnRfcHJlc2VudGVkIjpmYWxzZSwiY29tbW9uX25hbWUiOiIiLCJhdXRoX3N0YXR1cyI6Ik5PTkUifSwicmVhbF9jb3VudHJ5IjoiVVMiLCJhcHBfc2Vzc2lvbl9oYXNoIjoiNjMzYmRkNGQ3N2FiZjE0ODRhNDhhZTA1ZDBjMzI4ZTQwZGNiMmU4YTc0YjE5OTMxODk4Y2QwYmMzNTIwZGNlYSJ9.SCM0oogSeLLtaGlKim8FRBNdCQhACprvwfmMkcncOFx0--BkDsy3o8n4z0Mu-9hcawKsYvEFV-OEibLaa0pD6PbppU1u_g8kGTRPp28PS1JPejAto6TDjn3mVCBndz2fJlzRk8gRUPvmD4Fp0FyoONlozPNzu18YyVuXSrvlgL1Nxqbv7FEju6yQYseVf-AoOG_4O9whPoUsOc9or0Bl3XEVm5oFeIC1eLUh_PoJFTwH9lYwW92bn6euYVQ-2eBYQ32P926GYE9Gj03urO5n6hF6igI-C-GinzI2hCMojPDYSYjV7mX26hVlrq2TpMzyngYeP39RSbQ1M4Zila9l3g&redirect_url=%2F via 2606:4700:300a::6813:c31d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/CdByq9PFWd

Permanent link: aaaa.bot/r/CdByq9PFWd · How we measure

Checked 2026-11-06 01:34:30 UTC. Full DNS report: dns.pizza/domain/simpleteacher.app · Age, certificate and blocklists: how.is/simpleteacher.app · JSON: /api/v1/simpleteacher.app