Yes — build-website.click has IPv6.

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

Measured 2026-11-06 21:41 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check build-website.click now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 build-website.click has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:5a76 answers · 443✓ 2606:4700:3033::ac43:c867 answers · 443	yes
www over IPv6 www.build-website.click has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3033::ac43:c867 answers · 443✓ 2606:4700:3034::6815:5a76 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. phil.ns.cloudflare.com ✓vida.ns.cloudflare.com ✓	yes

First measured 2026-11-06; last confirmed 2026-11-06.

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

https://build-website.click/ via 2606:4700:3034::6815:5a76 → 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/build-website.click.svg)](https://aaaa.bot/build-website.click)

Check again

build-website.click Has IPv6

A (IPv4)	104.21.90.118 172.67.200.103
AAAA (IPv6)	2606:4700:3034::6815:5a76 2606:4700:3033::ac43:c867

www.build-website.click Has IPv6

A (IPv4)	104.21.90.118 172.67.200.103
AAAA (IPv6)	2606:4700:3033::ac43:c867 2606:4700:3034::6815:5a76

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: build-website.click
Measured 2026-11-06 21:41:33 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.90.118, 172.67.200.103
AAAA (IPv6): 2606:4700:3034::6815:5a76, 2606:4700:3033::ac43:c867
www AAAA:    2606:4700:3033::ac43:c867, 2606:4700:3034::6815:5a76

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: build-website.click has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:5a76: answers (TCP 443)
    2606:4700:3033::ac43:c867: answers (TCP 443)
- www over IPv6: www.build-website.click has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3033::ac43:c867: answers (TCP 443)
    2606:4700:3034::6815:5a76: 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: HTTP 200.
    https://build-website.click/ via 2606:4700:3034::6815:5a76 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/US9Jn-DjsL

Permanent link: aaaa.bot/r/US9Jn-DjsL · How we measure

Checked 2026-11-06 21:41:33 UTC. Full DNS report: dns.pizza/domain/build-website.click · Age, certificate and blocklists: how.is/build-website.click · JSON: /api/v1/build-website.click