Yes — lasys.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 lasys.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:1073 answers · 443✓ 2606:4700:3037::ac43:d408 answers · 443	yes
www over IPv6 www.lasys.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:1073 answers · 443✓ 2606:4700:3037::ac43:d408 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. rosalyn.ns.cloudflare.com ✓sterling.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 2 redirects: HTTP 200.

https://lasys.app/ via 2606:4700:3035::6815:1073 → 302https://lasys.io/ via 2606:4700:3037::6815:2dda → 302https://aj-lancaster.cloudflareaccess.com/cdn-cgi/access/login/lasys.io?kid=414afc1865e008a8092830b177c123a6a2078165971f27e07c6836319e7e2f58&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImZlYmE3MWRkZmMxZDZlMTY0ZjkxMWI5ODMzYjAxYWE4NDMzODIyNGE4ZjVlZWVkZTdlMzc3MzQzYjZkOWY5MGMifQ.eyJ0eXBlIjoibWV0YSIsImF1ZCI6IjQxNGFmYzE4NjVlMDA4YTgwOTI4MzBiMTc3YzEyM2E2YTIwNzgxNjU5NzFmMjdlMDdjNjgzNjMxOWU3ZTJmNTgiLCJob3N0bmFtZSI6Imxhc3lzLmlvIiwicmVkaXJlY3RfdXJsIjoiLyIsInNlcnZpY2VfdG9rZW5fc3RhdHVzIjpmYWxzZSwiaXNfd2FycCI6ZmFsc2UsImlzX2dhdGV3YXkiOmZhbHNlLCJleHAiOjE3OTM3NjEzODEsIm5iZiI6MTc5Mzc2MTA4MSwiaWF0IjoxNzkzNzYxMDgxLCJhdXRoX3N0YXR1cyI6Ik5PTkUiLCJtdGxzX2F1dGgiOnsiY2VydF9pc3N1ZXJfZG4iOiIiLCJjZXJ0X3NlcmlhbCI6IiIsImNlcnRfaXNzdWVyX3NraSI6IiIsImNlcnRfcHJlc2VudGVkIjpmYWxzZSwiY29tbW9uX25hbWUiOiIiLCJhdXRoX3N0YXR1cyI6Ik5PTkUifSwicmVhbF9jb3VudHJ5IjoiVVMiLCJhcHBfc2Vzc2lvbl9oYXNoIjoiODc2ZGViZTI0YjIyZDFjZDJhMWNkODAzNjJiMzBjYzc5MDFjYWZjNzQ1YTBkOGE4ZTc4YjNiYjJhMDc1Y2VhMSJ9.PnUEJ41eH0LLenGSUWgPu5tAB5gNHV6q0wSZXxkEkCwUxOdp-zz4Q575JrJNtgkf_lObCzyMdlv15Iu0is_upcWf6wiuP0e1BrQ11jxZ9PwS3VrupwK-YEf_S7iUVOnGX1RL9u0iYB-d6F0xgYBfMvZi6tnk929hHsbWu4k9R6U9JWZzOCG4Fih0tTqv4nV6gQQCKN6hff8fMQclkD2wyEVgpgdhFkfqcC1EBf41A1qd-WAaF-Lm-mmE7Y0f4crEx3m83w1iEuRGznR-pB4Z_EaDJE-wxcyHwA8e0evzAKjhqbbZeI4dgTd6ly8V377sLlH_2fEKTARrztZCcMKxmg&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/lasys.app.svg)](https://aaaa.bot/lasys.app)

Check again

lasys.app Has IPv6

A (IPv4)	104.21.16.115 172.67.212.8
AAAA (IPv6)	2606:4700:3035::6815:1073 2606:4700:3037::ac43:d408

www.lasys.app Has IPv6

A (IPv4)	104.21.16.115 172.67.212.8
AAAA (IPv6)	2606:4700:3035::6815:1073 2606:4700:3037::ac43:d408

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: lasys.app
Measured 2026-11-04 02:58:01 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.16.115, 172.67.212.8
AAAA (IPv6): 2606:4700:3035::6815:1073, 2606:4700:3037::ac43:d408
www AAAA:    2606:4700:3035::6815:1073, 2606:4700:3037::ac43:d408

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: lasys.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:1073: answers (TCP 443)
    2606:4700:3037::ac43:d408: answers (TCP 443)
- www over IPv6: www.lasys.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:1073: answers (TCP 443)
    2606:4700:3037::ac43:d408: 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 2 redirects: HTTP 200.
    https://lasys.app/ via 2606:4700:3035::6815:1073 -> HTTP 302, certificate: valid
    https://lasys.io/ via 2606:4700:3037::6815:2dda -> HTTP 302, certificate: valid
    https://aj-lancaster.cloudflareaccess.com/cdn-cgi/access/login/lasys.io?kid=414afc1865e008a8092830b177c123a6a2078165971f27e07c6836319e7e2f58&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImZlYmE3MWRkZmMxZDZlMTY0ZjkxMWI5ODMzYjAxYWE4NDMzODIyNGE4ZjVlZWVkZTdlMzc3MzQzYjZkOWY5MGMifQ.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.PnUEJ41eH0LLenGSUWgPu5tAB5gNHV6q0wSZXxkEkCwUxOdp-zz4Q575JrJNtgkf_lObCzyMdlv15Iu0is_upcWf6wiuP0e1BrQ11jxZ9PwS3VrupwK-YEf_S7iUVOnGX1RL9u0iYB-d6F0xgYBfMvZi6tnk929hHsbWu4k9R6U9JWZzOCG4Fih0tTqv4nV6gQQCKN6hff8fMQclkD2wyEVgpgdhFkfqcC1EBf41A1qd-WAaF-Lm-mmE7Y0f4crEx3m83w1iEuRGznR-pB4Z_EaDJE-wxcyHwA8e0evzAKjhqbbZeI4dgTd6ly8V377sLlH_2fEKTARrztZCcMKxmg&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/VZqKbxNK8b

Permanent link: aaaa.bot/r/VZqKbxNK8b · How we measure

Checked 2026-11-04 02:58:01 UTC. Full DNS report: dns.pizza/domain/lasys.app · Age, certificate and blocklists: how.is/lasys.app · JSON: /api/v1/lasys.app