Yes — correlation.tools has IPv6.

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

C
IPv6 readiness
Works over IPv6, with gaps: one of its IPv6 addresses doesn't answer; www doesn't fully work over IPv6; its nameservers lack IPv6.
Website over IPv6
1 of 4 IPv6 addresses for correlation.tools don't answer. Visitors sent to that one wait for a timeout before falling back.
✗ 2a05:d014:179b:c403:e36f:9187:c810:afa1 no answer✓ 2a05:d014:179b:c403:7ca2:c788:41b0:7d26 answers · 443✓ 2a05:d018:1d22:801:a216:a799:8c87:df21 answers · 443✓ 2a05:d014:179b:c402:796a:5979:8cae:ea4 answers · 443– 2a05:d014:179b:c400:5131:66d1:dcfb:6ae9 not tested– 2a05:d014:179b:c400:a327:40ee:24cc:6180 not tested– 2600:1f1c:6db:8801:5fb4:e525:dd88:52b2 not tested– 2406:da1e:214:c901:3a5:448f:b7b7:82e7 not tested
partly
www over IPv6
1 of 4 IPv6 addresses for www.correlation.tools don't answer. Visitors sent to that one wait for a timeout before falling back.
✗ 2a05:d014:179b:c403:e36f:9187:c810:afa1 no answer✓ 2a05:d014:179b:c403:7ca2:c788:41b0:7d26 answers · 443✓ 2a05:d018:1d22:801:a216:a799:8c87:df21 answers · 443✓ 2a05:d014:179b:c402:796a:5979:8cae:ea4 answers · 443– 2a05:d014:179b:c400:5131:66d1:dcfb:6ae9 not tested– 2a05:d014:179b:c400:a327:40ee:24cc:6180 not tested– 2600:1f1c:6db:8801:5fb4:e525:dd88:52b2 not tested– 2406:da1e:214:c901:3a5:448f:b7b7:82e7 not tested
partly
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
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
ns1.dns-redirect.com ✗ns2.dns-redirect.com ✗
no
HTTPS over IPv6 · not part of the grade yet
correlation.tools didn't complete an HTTPS request over IPv6 (ECONNREFUSED).
https://correlation.tools/ via 2a05:d014:179b:c403:e36f:9187:c810:afa1 · ECONNREFUSED
?
 Which outside scripts, fonts, payments or chat correlation.tools loads from have no IPv6.
 Load correlation.tools over IPv6 from up to six other places — a second opinion.

What's keeping correlation.tools from an A

  1. One of correlation.tools's IPv6 addresses doesn't answer
    2a05:d014:179b:c403:e36f:9187:c810:afa1 didn't accept a connection on 443 or 80 while others did. Remove it from DNS or fix that server — browsers that pick it wait for a timeout.
  2. One of www.correlation.tools's IPv6 addresses doesn't answer
    2a05:d014:179b:c403:e36f:9187:c810:afa1 didn't accept a connection on 443 or 80 while others did. Remove it from DNS or fix that server — browsers that pick it wait for a timeout.
  3. Nameservers without IPv6
    ns1.dns-redirect.com, ns2.dns-redirect.com all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

correlation.tools  Has IPv6

A (IPv4)5.161.47.86
5.78.156.59
76.223.91.20
5.161.230.87
46.62.237.138
195.201.128.179
AAAA (IPv6)2a05:d014:179b:c403:e36f:9187:c810:afa1
2a05:d014:179b:c403:7ca2:c788:41b0:7d26
2a05:d018:1d22:801:a216:a799:8c87:df21
2a05:d014:179b:c402:796a:5979:8cae:ea4
2a05:d014:179b:c400:5131:66d1:dcfb:6ae9
2a05:d014:179b:c400:a327:40ee:24cc:6180
2600:1f1c:6db:8801:5fb4:e525:dd88:52b2
2406:da1e:214:c901:3a5:448f:b7b7:82e7

www.correlation.tools  Has IPv6

A (IPv4)5.161.47.86
5.78.156.59
76.223.91.20
5.161.230.87
46.62.237.138
195.201.128.179
AAAA (IPv6)2a05:d014:179b:c403:e36f:9187:c810:afa1
2a05:d014:179b:c403:7ca2:c788:41b0:7d26
2a05:d018:1d22:801:a216:a799:8c87:df21
2a05:d014:179b:c402:796a:5979:8cae:ea4
2a05:d014:179b:c400:5131:66d1:dcfb:6ae9
2a05:d014:179b:c400:a327:40ee:24cc:6180
2600:1f1c:6db:8801:5fb4:e525:dd88:52b2
2406:da1e:214:c901:3a5:448f:b7b7:82e7

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/DYaWH4yq3V · How we measure

Checked 2026-11-06 03:51:03 UTC. Full DNS report: dns.pizza/domain/correlation.tools · Age, certificate and blocklists: how.is/correlation.tools · JSON: /api/v1/correlation.tools