Yes — refresher.sk has IPv6.

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

This is a saved measurement from 2026-11-15 15:46 UTC. Check refresher.sk live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 refresher.sk has 3 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:20::681a:edc answers · 443✓ 2606:4700:20::681a:fdc answers · 443✓ 2606:4700:20::ac43:450b answers · 443	yes
www over IPv6 www.refresher.sk has 3 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:20::681a:edc answers · 443✓ 2606:4700:20::681a:fdc answers · 443✓ 2606:4700:20::ac43:450b answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. alt1.aspmx.l.google.com ✓alt2.aspmx.l.google.com ✓alt3.aspmx.l.google.com ✓alt4.aspmx.l.google.com ✓mta.vshosting.eu ✓mta.vshosting.cloud ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. henrik.ns.cloudflare.com ✓marissa.ns.cloudflare.com ✓	yes

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

https://refresher.sk/ via 2606:4700:20::681a:edc → 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/refresher.sk.svg)](https://aaaa.bot/refresher.sk)

Check again

refresher.sk Has IPv6

A (IPv4)	104.26.14.220 104.26.15.220 172.67.69.11
AAAA (IPv6)	2606:4700:20::681a:edc 2606:4700:20::681a:fdc 2606:4700:20::ac43:450b

www.refresher.sk Has IPv6

A (IPv4)	104.26.14.220 104.26.15.220 172.67.69.11
AAAA (IPv6)	2606:4700:20::681a:edc 2606:4700:20::681a:fdc 2606:4700:20::ac43:450b

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: refresher.sk
Measured 2026-11-15 15:46:33 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.26.14.220, 104.26.15.220, 172.67.69.11
AAAA (IPv6): 2606:4700:20::681a:edc, 2606:4700:20::681a:fdc, 2606:4700:20::ac43:450b
www AAAA:    2606:4700:20::681a:edc, 2606:4700:20::681a:fdc, 2606:4700:20::ac43:450b

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: refresher.sk has 3 IPv6 addresses and answers on every one we tested.
    2606:4700:20::681a:edc: answers (TCP 443)
    2606:4700:20::681a:fdc: answers (TCP 443)
    2606:4700:20::ac43:450b: answers (TCP 443)
- www over IPv6: www.refresher.sk has 3 IPv6 addresses and answers on every one we tested.
    2606:4700:20::681a:edc: answers (TCP 443)
    2606:4700:20::681a:fdc: answers (TCP 443)
    2606:4700:20::ac43:450b: 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://refresher.sk/ via 2606:4700:20::681a:edc -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/xpBAzc2Fct

Permanent link: aaaa.bot/r/xpBAzc2Fct · How we measure

Checked 2026-11-15 15:46:33 UTC. Full DNS report: dns.pizza/domain/refresher.sk · Age, certificate and blocklists: how.is/refresher.sk · JSON: /api/v1/refresher.sk