Yes — koolacnheatpluservices.com has IPv6.

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

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
koolacnheatpluservices.com has an AAAA record and answers on it.
✓ 2607:f1c0:100f:f000::200 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx01.ionos.com ✗mx00.ionos.com ✗
no
Nameservers have IPv6
4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns1092.ui-dns.de ✓ns1076.ui-dns.org ✓ns1102.ui-dns.biz ✓ns1099.ui-dns.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
koolacnheatpluservices.com didn't complete an HTTPS request over IPv6 (ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR).
https://koolacnheatpluservices.com/ via 2607:f1c0:100f:f000::200 · ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR
?
 Load koolacnheatpluservices.com over IPv6 from up to six other places — a second opinion.

What's keeping koolacnheatpluservices.com from an A

  1. Mail servers without IPv6
    mx01.ionos.com, mx00.ionos.com have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

koolacnheatpluservices.com  Has IPv6

A (IPv4)74.208.236.110
AAAA (IPv6)2607:f1c0:100f:f000::200

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/S9mMkdPQdK · How we measure

Checked 2026-11-01 00:53:51 UTC. Full DNS report: dns.pizza/domain/koolacnheatpluservices.com · JSON: /api/v1/koolacnheatpluservices.com