Yes — bookengineai.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 bookengineai.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53 answers · 443✓ 2a02:4780:84:21b8:b4c:360f:49f4:58b3 answers · 443	yes
www over IPv6 www.bookengineai.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:3072:61b4:242f:31ab:f4da answers · 443✓ 2a02:4780:84:6ae:6dd1:c05f:6cfc:ccf0 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mx1.hostinger.com ✓mx2.hostinger.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. athena.dns-parking.com ✓apollo.dns-parking.com ✓	yes

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

https://bookengineai.com/ via 2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53 → 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/bookengineai.com.svg)](https://aaaa.bot/bookengineai.com)

Check again

bookengineai.com Has IPv6

A (IPv4)	88.222.222.108 2.57.91.35
AAAA (IPv6)	2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53 2a02:4780:84:21b8:b4c:360f:49f4:58b3

www.bookengineai.com Has IPv6

Alias of	www.bookengineai.com.cdn.hstgr.net
A (IPv4)	88.222.222.122 2.57.91.132
AAAA (IPv6)	2a02:4780:84:3072:61b4:242f:31ab:f4da 2a02:4780:84:6ae:6dd1:c05f:6cfc:ccf0

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: bookengineai.com
Measured 2026-11-12 09:55:06 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    88.222.222.108, 2.57.91.35
AAAA (IPv6): 2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53, 2a02:4780:84:21b8:b4c:360f:49f4:58b3
www AAAA:    2a02:4780:84:3072:61b4:242f:31ab:f4da, 2a02:4780:84:6ae:6dd1:c05f:6cfc:ccf0

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: bookengineai.com has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53: answers (TCP 443)
    2a02:4780:84:21b8:b4c:360f:49f4:58b3: answers (TCP 443)
- www over IPv6: www.bookengineai.com has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:3072:61b4:242f:31ab:f4da: answers (TCP 443)
    2a02:4780:84:6ae:6dd1:c05f:6cfc:ccf0: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server 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://bookengineai.com/ via 2a02:4780:84:a9f3:2ca0:4030:9a1b:cd53 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/OsEkuVF7Uu

Permanent link: aaaa.bot/r/OsEkuVF7Uu · How we measure

Checked 2026-11-12 09:55:06 UTC. Full DNS report: dns.pizza/domain/bookengineai.com · Age, certificate and blocklists: how.is/bookengineai.com · JSON: /api/v1/bookengineai.com