Yes — slackwise.app has IPv6.

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

A
IPv6 readiness
Website, mail and DNS all work over IPv6.
Website over IPv6
slackwise.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3030::ac43:810a answers · 443✓ 2606:4700:3037::6815:25d answers · 443
yes
www over IPv6
www.slackwise.app has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3037::6815:25d answers · 443✓ 2606:4700:3030::ac43:810a answers · 443
yes
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
route1.mx.cloudflare.net ✓route2.mx.cloudflare.net ✓route3.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.
ezra.ns.cloudflare.com ✓virginia.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://slackwise.app/ via 2606:4700:3030::ac43:810a → 200
works
 Which outside scripts, fonts, payments or chat slackwise.app loads from have no IPv6.
 Load slackwise.app over IPv6 from up to six other places — a second opinion.

Nothing keeping you from an A

  1. Nothing to fix
    Show it off: add the badge to your README.
    [![IPv6](https://aaaa.bot/badge/slackwise.app.svg)](https://aaaa.bot/slackwise.app)

Check again

slackwise.app  Has IPv6

A (IPv4)104.21.2.93
172.67.129.10
AAAA (IPv6)2606:4700:3030::ac43:810a
2606:4700:3037::6815:25d

www.slackwise.app  Has IPv6

A (IPv4)172.67.129.10
104.21.2.93
AAAA (IPv6)2606:4700:3037::6815:25d
2606:4700:3030::ac43:810a

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/R3aPuvT-hv · How we measure

Checked 2026-11-14 02:54:49 UTC. Full DNS report: dns.pizza/domain/slackwise.app · Age, certificate and blocklists: how.is/slackwise.app · JSON: /api/v1/slackwise.app