Yes — jysk.cz has IPv6.

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

This is a saved measurement from 2026-11-15 15:48 UTC. Check jysk.cz live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 jysk.cz has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:5400:35::17ca:e6d1 answers · 443✓ 2600:1408:5400:35::17ca:e6d2 answers · 443	yes
www over IPv6 www.jysk.cz has 2 IPv6 addresses and answers on every one we tested. ✓ 2600:1408:5400:35::17ca:e6d2 answers · 443✓ 2600:1408:5400:35::17ca:e6d1 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mailbox.nmu.nu ✓	yes
Nameservers have IPv6 6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. a10-64.akam.net ✓a1-160.akam.net ✓a5-65.akam.net ✓a18-64.akam.net ✓a26-67.akam.net ✓a13-66.akam.net ✓	yes

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

https://jysk.cz/ via 2600:1408:5400:35::17ca:e6d1 → 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/jysk.cz.svg)](https://aaaa.bot/jysk.cz)

Check again

jysk.cz Has IPv6

A (IPv4)	23.202.230.210 23.202.230.209
AAAA (IPv6)	2600:1408:5400:35::17ca:e6d1 2600:1408:5400:35::17ca:e6d2

www.jysk.cz Has IPv6

Alias of	www.jysk.com.edgekey.net → e108241.dscb.akamaiedge.net
A (IPv4)	23.202.230.210 23.202.230.209
AAAA (IPv6)	2600:1408:5400:35::17ca:e6d2 2600:1408:5400:35::17ca:e6d1

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: jysk.cz
Measured 2026-11-15 15:48:24 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    23.202.230.210, 23.202.230.209
AAAA (IPv6): 2600:1408:5400:35::17ca:e6d1, 2600:1408:5400:35::17ca:e6d2
www AAAA:    2600:1408:5400:35::17ca:e6d2, 2600:1408:5400:35::17ca:e6d1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: jysk.cz has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:5400:35::17ca:e6d1: answers (TCP 443)
    2600:1408:5400:35::17ca:e6d2: answers (TCP 443)
- www over IPv6: www.jysk.cz has 2 IPv6 addresses and answers on every one we tested.
    2600:1408:5400:35::17ca:e6d2: answers (TCP 443)
    2600:1408:5400:35::17ca:e6d1: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 6 of 6 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://jysk.cz/ via 2600:1408:5400:35::17ca:e6d1 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/UMdCMXG37p

Permanent link: aaaa.bot/r/UMdCMXG37p · How we measure

Checked 2026-11-15 15:48:24 UTC. Full DNS report: dns.pizza/domain/jysk.cz · Age, certificate and blocklists: how.is/jysk.cz · JSON: /api/v1/jysk.cz