Yes — kosystem.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 kosystem.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:d562 answers · 443✓ 2606:4700:3035::6815:3589 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. monroe.ns.cloudflare.com ✓zeus.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://kosystem.app/ via 2606:4700:3037::ac43:d562 → 302https://wild-hall-8701.cloudflareaccess.com/cdn-cgi/access/login/kosystem.app?kid=d00ba29457844670a64deea21c747bd761401e99fea0c819314e2d78a5bba25e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.dSagTsTiZ_X_RF_yE__GiFofK7OeY92uRz8xZHTS75abL0pQSoH-6rgPiMJ4zvSmbyqzrGj7ZrGX_DQHHQo5sn5jt27EhzWixwsCeFeE3kJXc_LKwAF2SSke2hBuzYW3I-6R6WHASTfnqNtD6aM6loLornIGv_597NTvVOdHsxybbS_-WdXC3wF-S2dcChesbxmoK0Or5kAQ5Ltp_6ZXxrCNGGQ3aVyIpWHolkoNej178BclUQNqZ_ZFEphiwfQsgOND8Cid2MNown-vc3fu46O3JxS4ER444kDeiW4dmBkxa4WHH3fH8vFR8zDYJcmU9DjRfoaTSEsC797TetJUKg&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/kosystem.app.svg)](https://aaaa.bot/kosystem.app)

Check again

kosystem.app Has IPv6

A (IPv4)	172.67.213.98 104.21.53.137
AAAA (IPv6)	2606:4700:3037::ac43:d562 2606:4700:3035::6815:3589

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: kosystem.app
Measured 2026-11-14 04:58:52 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.213.98, 104.21.53.137
AAAA (IPv6): 2606:4700:3037::ac43:d562, 2606:4700:3035::6815:3589

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: kosystem.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:d562: answers (TCP 443)
    2606:4700:3035::6815:3589: 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://kosystem.app/ via 2606:4700:3037::ac43:d562 -> HTTP 302, certificate: valid
    https://wild-hall-8701.cloudflareaccess.com/cdn-cgi/access/login/kosystem.app?kid=d00ba29457844670a64deea21c747bd761401e99fea0c819314e2d78a5bba25e&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.dSagTsTiZ_X_RF_yE__GiFofK7OeY92uRz8xZHTS75abL0pQSoH-6rgPiMJ4zvSmbyqzrGj7ZrGX_DQHHQo5sn5jt27EhzWixwsCeFeE3kJXc_LKwAF2SSke2hBuzYW3I-6R6WHASTfnqNtD6aM6loLornIGv_597NTvVOdHsxybbS_-WdXC3wF-S2dcChesbxmoK0Or5kAQ5Ltp_6ZXxrCNGGQ3aVyIpWHolkoNej178BclUQNqZ_ZFEphiwfQsgOND8Cid2MNown-vc3fu46O3JxS4ER444kDeiW4dmBkxa4WHH3fH8vFR8zDYJcmU9DjRfoaTSEsC797TetJUKg&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/lmme2Rp5FR

Permanent link: aaaa.bot/r/lmme2Rp5FR · How we measure

Checked 2026-11-14 04:58:52 UTC. Full DNS report: dns.pizza/domain/kosystem.app · Age, certificate and blocklists: how.is/kosystem.app · JSON: /api/v1/kosystem.app