Yes — heysidekick.app has IPv6.

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

Measured 2026-11-06 05:54 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check heysidekick.app now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 heysidekick.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::6815:1b99 answers · 443✓ 2606:4700:3031::ac43:8ef6 answers · 443	yes
www over IPv6 www.heysidekick.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::ac43:8ef6 answers · 443✓ 2606:4700:3037::6815:1b99 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. ryan.ns.cloudflare.com ✓wally.ns.cloudflare.com ✓	yes

First measured 2026-11-06; last confirmed 2026-11-06.

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

https://heysidekick.app/ via 2606:4700:3037::6815:1b99 → 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/heysidekick.app.svg)](https://aaaa.bot/heysidekick.app)

Check again

heysidekick.app Has IPv6

A (IPv4)	104.21.27.153 172.67.142.246
AAAA (IPv6)	2606:4700:3037::6815:1b99 2606:4700:3031::ac43:8ef6

www.heysidekick.app Has IPv6

A (IPv4)	172.67.142.246 104.21.27.153
AAAA (IPv6)	2606:4700:3031::ac43:8ef6 2606:4700:3037::6815:1b99

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: heysidekick.app
Measured 2026-11-06 05:54:35 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.27.153, 172.67.142.246
AAAA (IPv6): 2606:4700:3037::6815:1b99, 2606:4700:3031::ac43:8ef6
www AAAA:    2606:4700:3031::ac43:8ef6, 2606:4700:3037::6815:1b99

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: heysidekick.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::6815:1b99: answers (TCP 443)
    2606:4700:3031::ac43:8ef6: answers (TCP 443)
- www over IPv6: www.heysidekick.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::ac43:8ef6: answers (TCP 443)
    2606:4700:3037::6815:1b99: 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://heysidekick.app/ via 2606:4700:3037::6815:1b99 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/N_kfnqa1s0

Permanent link: aaaa.bot/r/N_kfnqa1s0 · How we measure

Checked 2026-11-06 05:54:35 UTC. Full DNS report: dns.pizza/domain/heysidekick.app · Age, certificate and blocklists: how.is/heysidekick.app · JSON: /api/v1/heysidekick.app