Yes — onlab.top has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 onlab.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::ac43:8899 answers · 443✓ 2606:4700:3037::6815:56c6 answers · 443	yes
www over IPv6 www.onlab.top has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3030::ac43:8899 answers · 443✓ 2606:4700:3037::6815:56c6 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. route1.mx.cloudflare.net ✓route3.mx.cloudflare.net ✓route2.mx.cloudflare.net ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. adrian.ns.cloudflare.com ✓harvey.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://onlab.top/ via 2606:4700:3030::ac43:8899 → 301https://www.google.com/ via 2001:4860:482a:7700:: → 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/onlab.top.svg)](https://aaaa.bot/onlab.top)

Check again

onlab.top Has IPv6

A (IPv4)	104.21.86.198 172.67.136.153
AAAA (IPv6)	2606:4700:3030::ac43:8899 2606:4700:3037::6815:56c6

www.onlab.top Has IPv6

A (IPv4)	104.21.86.198 172.67.136.153
AAAA (IPv6)	2606:4700:3030::ac43:8899 2606:4700:3037::6815:56c6

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: onlab.top
Measured 2026-11-14 02:26:07 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.86.198, 172.67.136.153
AAAA (IPv6): 2606:4700:3030::ac43:8899, 2606:4700:3037::6815:56c6
www AAAA:    2606:4700:3030::ac43:8899, 2606:4700:3037::6815:56c6

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: onlab.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::ac43:8899: answers (TCP 443)
    2606:4700:3037::6815:56c6: answers (TCP 443)
- www over IPv6: www.onlab.top has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3030::ac43:8899: answers (TCP 443)
    2606:4700:3037::6815:56c6: 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 after 1 redirect: HTTP 200.
    https://onlab.top/ via 2606:4700:3030::ac43:8899 -> HTTP 301, certificate: valid
    https://www.google.com/ via 2001:4860:482a:7700:: -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/Dyu0YdGu4u

Permanent link: aaaa.bot/r/Dyu0YdGu4u · How we measure

Checked 2026-11-14 02:26:07 UTC. Full DNS report: dns.pizza/domain/onlab.top · Age, certificate and blocklists: how.is/onlab.top · JSON: /api/v1/onlab.top