Yes — enginetools.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 enginetools.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:d902 answers · 443✓ 2606:4700:3033::6815:35bf answers · 443	yes
www over IPv6 www.enginetools.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:d902 answers · 443✓ 2606:4700:3033::6815:35bf 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. brian.ns.cloudflare.com ✓leah.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://enginetools.app/ via 2606:4700:3031::ac43:d902 → 302https://enginetools.cloudflareaccess.com/cdn-cgi/access/login/enginetools.app?kid=f6e21e3fb9dbc83847e84faa12f4ee1d9f1b0d33b827d730e242f6bd97e6a959&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.ZeyJVSc3HCOUHojsGS5GtuuJxP1F_d63K5ivwgL2obaUF2H2ReHlyb8jzstf33Qae-MzgC4x35N4Z0PEu40Z9qNuW34RXYFUI_Yi0l-BgsqWEXtmz_MRApny1JLDbxne1PxYVgAmY-_J2eOSw6llPogxVYr51stn3oSf-Sgzq9KWNW0JbqFFh4SBWJ7JWMJMZkVE2dXb-b0mqmmOysTGiVvCLaQf12gMF08muC-ehgh5B4R3JzGYCKulqIssB8RW82kcQQLIuigzJHwrhxLBWuuMu1wrCoLvpQipBzwp9eEQ6S3QhSPlt4ag_gRtjfD4nD2LX6RRyyYpSj9iAdt6zQ&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/enginetools.app.svg)](https://aaaa.bot/enginetools.app)

Check again

enginetools.app Has IPv6

A (IPv4)	172.67.217.2 104.21.53.191
AAAA (IPv6)	2606:4700:3031::ac43:d902 2606:4700:3033::6815:35bf

www.enginetools.app Has IPv6

A (IPv4)	104.21.53.191 172.67.217.2
AAAA (IPv6)	2606:4700:3031::ac43:d902 2606:4700:3033::6815:35bf

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: enginetools.app
Measured 2026-11-10 07:29:15 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.217.2, 104.21.53.191
AAAA (IPv6): 2606:4700:3031::ac43:d902, 2606:4700:3033::6815:35bf
www AAAA:    2606:4700:3031::ac43:d902, 2606:4700:3033::6815:35bf

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: enginetools.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:d902: answers (TCP 443)
    2606:4700:3033::6815:35bf: answers (TCP 443)
- www over IPv6: www.enginetools.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:d902: answers (TCP 443)
    2606:4700:3033::6815:35bf: 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://enginetools.app/ via 2606:4700:3031::ac43:d902 -> HTTP 302, certificate: valid
    https://enginetools.cloudflareaccess.com/cdn-cgi/access/login/enginetools.app?kid=f6e21e3fb9dbc83847e84faa12f4ee1d9f1b0d33b827d730e242f6bd97e6a959&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6Ijg2OGFmMjMzMzMwYTk2ZmFjNTUzMTBhMmQyN2E2MmQ1ZWM1YWY5Zjg3ZDBhOTg5OTNhMzk0MjZlMDg1NGI2NzcifQ.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.ZeyJVSc3HCOUHojsGS5GtuuJxP1F_d63K5ivwgL2obaUF2H2ReHlyb8jzstf33Qae-MzgC4x35N4Z0PEu40Z9qNuW34RXYFUI_Yi0l-BgsqWEXtmz_MRApny1JLDbxne1PxYVgAmY-_J2eOSw6llPogxVYr51stn3oSf-Sgzq9KWNW0JbqFFh4SBWJ7JWMJMZkVE2dXb-b0mqmmOysTGiVvCLaQf12gMF08muC-ehgh5B4R3JzGYCKulqIssB8RW82kcQQLIuigzJHwrhxLBWuuMu1wrCoLvpQipBzwp9eEQ6S3QhSPlt4ag_gRtjfD4nD2LX6RRyyYpSj9iAdt6zQ&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/zcfxjBDJZc

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

Checked 2026-11-10 07:29:15 UTC. Full DNS report: dns.pizza/domain/enginetools.app · Age, certificate and blocklists: how.is/enginetools.app · JSON: /api/v1/enginetools.app