Yes — onetune.dev has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 onetune.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:b1fe:e4b7:adf8:93bc:e33 answers · 443✓ 2a02:4780:84:b138:74ef:528a:41be:e9a4 answers · 443	yes
www over IPv6 www.onetune.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:7494:1513:7bd:1450:f1ae answers · 443✓ 2a02:4780:84:1415:d741:d2f:37f4:53e1 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. hermes.dns-parking.com ✓artemis.dns-parking.com ✓	yes

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

https://onetune.dev/ via 2a02:4780:84:b1fe:e4b7:adf8:93bc:e33 → 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/onetune.dev.svg)](https://aaaa.bot/onetune.dev)

Check again

onetune.dev Has IPv6

A (IPv4)	2.57.91.44 88.222.222.70
AAAA (IPv6)	2a02:4780:84:b1fe:e4b7:adf8:93bc:e33 2a02:4780:84:b138:74ef:528a:41be:e9a4

www.onetune.dev Has IPv6

Alias of	www.onetune.dev.cdn.hstgr.net
A (IPv4)	88.223.87.164 147.79.79.101
AAAA (IPv6)	2a02:4780:84:7494:1513:7bd:1450:f1ae 2a02:4780:84:1415:d741:d2f:37f4:53e1

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: onetune.dev
Measured 2026-11-11 05:43:16 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    2.57.91.44, 88.222.222.70
AAAA (IPv6): 2a02:4780:84:b1fe:e4b7:adf8:93bc:e33, 2a02:4780:84:b138:74ef:528a:41be:e9a4
www AAAA:    2a02:4780:84:7494:1513:7bd:1450:f1ae, 2a02:4780:84:1415:d741:d2f:37f4:53e1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: onetune.dev has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:b1fe:e4b7:adf8:93bc:e33: answers (TCP 443)
    2a02:4780:84:b138:74ef:528a:41be:e9a4: answers (TCP 443)
- www over IPv6: www.onetune.dev has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:7494:1513:7bd:1450:f1ae: answers (TCP 443)
    2a02:4780:84:1415:d741:d2f:37f4:53e1: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It 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://onetune.dev/ via 2a02:4780:84:b1fe:e4b7:adf8:93bc:e33 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/KyiihHNKdb

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

Checked 2026-11-11 05:43:16 UTC. Full DNS report: dns.pizza/domain/onetune.dev · Age, certificate and blocklists: how.is/onetune.dev · JSON: /api/v1/onetune.dev