Yes — ultraemailer.org has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 ultraemailer.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:7c54:335c:274:ecd9:9b53 answers · 443✓ 2a02:4780:84:97e4:8dc:e89:f4b:4267 answers · 443	yes
www over IPv6 www.ultraemailer.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:4d:43c4:f84e:2464:745a:7bef answers · 443✓ 2a02:4780:4a:d9b4:9f41:26a5:4266:801d 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. hyperion.dns-parking.com ✓atlas.dns-parking.com ✓	yes

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

https://ultraemailer.org/ via 2a02:4780:84:7c54:335c:274:ecd9:9b53 → 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/ultraemailer.org.svg)](https://aaaa.bot/ultraemailer.org)

Check again

ultraemailer.org Has IPv6

A (IPv4)	147.79.72.29 145.223.124.134
AAAA (IPv6)	2a02:4780:84:7c54:335c:274:ecd9:9b53 2a02:4780:84:97e4:8dc:e89:f4b:4267

www.ultraemailer.org Has IPv6

Alias of	www.ultraemailer.org.cdn.hstgr.net
A (IPv4)	88.223.87.93 147.79.72.245
AAAA (IPv6)	2a02:4780:4d:43c4:f84e:2464:745a:7bef 2a02:4780:4a:d9b4:9f41:26a5:4266:801d

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: ultraemailer.org
Measured 2026-11-10 11:05:24 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    147.79.72.29, 145.223.124.134
AAAA (IPv6): 2a02:4780:84:7c54:335c:274:ecd9:9b53, 2a02:4780:84:97e4:8dc:e89:f4b:4267
www AAAA:    2a02:4780:4d:43c4:f84e:2464:745a:7bef, 2a02:4780:4a:d9b4:9f41:26a5:4266:801d

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: ultraemailer.org has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:7c54:335c:274:ecd9:9b53: answers (TCP 443)
    2a02:4780:84:97e4:8dc:e89:f4b:4267: answers (TCP 443)
- www over IPv6: www.ultraemailer.org has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:4d:43c4:f84e:2464:745a:7bef: answers (TCP 443)
    2a02:4780:4a:d9b4:9f41:26a5:4266:801d: 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://ultraemailer.org/ via 2a02:4780:84:7c54:335c:274:ecd9:9b53 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/SGLGOA0t-3

Permanent link: aaaa.bot/r/SGLGOA0t-3 · How we measure

Checked 2026-11-10 11:05:24 UTC. Full DNS report: dns.pizza/domain/ultraemailer.org · Age, certificate and blocklists: how.is/ultraemailer.org · JSON: /api/v1/ultraemailer.org