Yes — crewbill.online has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 crewbill.online has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:455a:8bc8:952e:67cb:3671 answers · 443✓ 2a02:4780:84:57f2:718f:7e7d:a981:579e answers · 443	yes
www over IPv6 www.crewbill.online has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:342e:a128:9ab7:468:66e8 answers · 443✓ 2a02:4780:84:bb03:5745:729a:d697:ee8e answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mx2.hostinger.com ✓mx1.hostinger.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. orbit.dns-parking.com ✓horizon.dns-parking.com ✓	yes

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

https://crewbill.online/ via 2a02:4780:84:455a:8bc8:952e:67cb:3671 → 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/crewbill.online.svg)](https://aaaa.bot/crewbill.online)

Check again

crewbill.online Has IPv6

A (IPv4)	84.32.84.106 88.222.222.83
AAAA (IPv6)	2a02:4780:84:455a:8bc8:952e:67cb:3671 2a02:4780:84:57f2:718f:7e7d:a981:579e

www.crewbill.online Has IPv6

Alias of	www.crewbill.online.cdn.hstgr.net
A (IPv4)	88.223.87.157 145.223.124.37
AAAA (IPv6)	2a02:4780:84:342e:a128:9ab7:468:66e8 2a02:4780:84:bb03:5745:729a:d697:ee8e

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: crewbill.online
Measured 2026-11-11 19:09:49 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    84.32.84.106, 88.222.222.83
AAAA (IPv6): 2a02:4780:84:455a:8bc8:952e:67cb:3671, 2a02:4780:84:57f2:718f:7e7d:a981:579e
www AAAA:    2a02:4780:84:342e:a128:9ab7:468:66e8, 2a02:4780:84:bb03:5745:729a:d697:ee8e

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: crewbill.online has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:455a:8bc8:952e:67cb:3671: answers (TCP 443)
    2a02:4780:84:57f2:718f:7e7d:a981:579e: answers (TCP 443)
- www over IPv6: www.crewbill.online has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:342e:a128:9ab7:468:66e8: answers (TCP 443)
    2a02:4780:84:bb03:5745:729a:d697:ee8e: 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://crewbill.online/ via 2a02:4780:84:455a:8bc8:952e:67cb:3671 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/4MKNk0cuRp

Permanent link: aaaa.bot/r/4MKNk0cuRp · How we measure

Checked 2026-11-11 19:09:49 UTC. Full DNS report: dns.pizza/domain/crewbill.online · Age, certificate and blocklists: how.is/crewbill.online · JSON: /api/v1/crewbill.online