Yes — webmail.eonet.jp has IPv6.

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

This is a saved measurement from 2026-11-15 16:26 UTC. Check webmail.eonet.jp live now

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
webmail.eonet.jp has an AAAA record and answers on it.
✓ 2001:ce8:0:603::53 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.
ns7.eonet.ne.jp ✓ns1.eonet.ne.jp ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
https://webmail.eonet.jp/ via 2001:ce8:0:603::53 → 302https://eowebmail.eonet.jp/ via 2001:240:bb81:94:202:238:198:36 → 200
works

Nothing keeping you from an A

  1. Nothing to fix
    Show it off: add the badge to your README.
    [![IPv6](https://aaaa.bot/badge/webmail.eonet.jp.svg)](https://aaaa.bot/webmail.eonet.jp)

Check again

webmail.eonet.jp  Has IPv6

A (IPv4)203.140.81.53
AAAA (IPv6)2001:ce8:0:603::53

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

 Permanent link: aaaa.bot/r/V1gHdvTTb7 · How we measure

Checked 2026-11-15 16:26:12 UTC. Full DNS report: dns.pizza/domain/webmail.eonet.jp · Age, certificate and blocklists: how.is/webmail.eonet.jp · JSON: /api/v1/webmail.eonet.jp