Yes — polymer.run has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 polymer.run has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::6815:fe5 answers · 443✓ 2606:4700:3036::ac43:d02a 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. coco.ns.cloudflare.com ✓keaton.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://polymer.run/ via 2606:4700:3033::6815:fe5 → 302https://polymer-run.cloudflareaccess.com/cdn-cgi/access/login/polymer.run?kid=a076d0968d39ff504c2bc82352fca4f0fdc1fd43022d5f6ae97a76b7fcfe0ba1&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.P7timgxImjECoknbOdMgU84xKh0v9Qpicfh4Fn8ieu_yiFNPgVy-UQpoCdQq1cFDP2cOcnpafID8V2x_N32W0l7MyGiPkVsqb1tH2jdLwkbqZ5TBPHfhoyVOUvZMHkObkVb6remlzhZvIRitbf-SeIoyEWJuPJfhafG8cp8aWHLWB6pYwOkBRR5_BUqYte0VZEaa07hRuGYFyDUpCK5SusGtel1d9bu70eRgFIBrK_Tx-AoNpgeIGxQwyYS89bKiMcCpZOtFm9WKf9MYBIeK4gtutAmkk7wDFMbpwmRRo776nvRGCANomTXSkKHr12utxUzFGhKO3mrNM7FknQ-HuQ&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/polymer.run.svg)](https://aaaa.bot/polymer.run)

Check again

polymer.run Has IPv6

A (IPv4)	104.21.15.229 172.67.208.42
AAAA (IPv6)	2606:4700:3033::6815:fe5 2606:4700:3036::ac43:d02a

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: polymer.run
Measured 2026-11-12 13:53:31 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.15.229, 172.67.208.42
AAAA (IPv6): 2606:4700:3033::6815:fe5, 2606:4700:3036::ac43:d02a

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: polymer.run has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::6815:fe5: answers (TCP 443)
    2606:4700:3036::ac43:d02a: 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://polymer.run/ via 2606:4700:3033::6815:fe5 -> HTTP 302, certificate: valid
    https://polymer-run.cloudflareaccess.com/cdn-cgi/access/login/polymer.run?kid=a076d0968d39ff504c2bc82352fca4f0fdc1fd43022d5f6ae97a76b7fcfe0ba1&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.P7timgxImjECoknbOdMgU84xKh0v9Qpicfh4Fn8ieu_yiFNPgVy-UQpoCdQq1cFDP2cOcnpafID8V2x_N32W0l7MyGiPkVsqb1tH2jdLwkbqZ5TBPHfhoyVOUvZMHkObkVb6remlzhZvIRitbf-SeIoyEWJuPJfhafG8cp8aWHLWB6pYwOkBRR5_BUqYte0VZEaa07hRuGYFyDUpCK5SusGtel1d9bu70eRgFIBrK_Tx-AoNpgeIGxQwyYS89bKiMcCpZOtFm9WKf9MYBIeK4gtutAmkk7wDFMbpwmRRo776nvRGCANomTXSkKHr12utxUzFGhKO3mrNM7FknQ-HuQ&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/mHlAfPBA7X

Permanent link: aaaa.bot/r/mHlAfPBA7X · How we measure

Checked 2026-11-12 13:53:31 UTC. Full DNS report: dns.pizza/domain/polymer.run · Age, certificate and blocklists: how.is/polymer.run · JSON: /api/v1/polymer.run