Yes — feedplumb.app has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 feedplumb.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::ac43:a132 answers · 443✓ 2606:4700:3035::6815:5186 answers · 443	yes
www over IPv6 www.feedplumb.app has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::6815:5186 answers · 443✓ 2606:4700:3032::ac43:a132 answers · 443	yes
Mail servers (MX) have IPv6 Null MX — this domain says it doesn't receive mail.	n/a
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. alexia.ns.cloudflare.com ✓simon.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://feedplumb.app/ via 2606:4700:3032::ac43:a132 → 301https://www.feedplumb.app/ via 2606:4700:3035::6815:5186 → 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/feedplumb.app.svg)](https://aaaa.bot/feedplumb.app)

Check again

feedplumb.app Has IPv6

A (IPv4)	172.67.161.50 104.21.81.134
AAAA (IPv6)	2606:4700:3032::ac43:a132 2606:4700:3035::6815:5186

www.feedplumb.app Has IPv6

A (IPv4)	104.21.81.134 172.67.161.50
AAAA (IPv6)	2606:4700:3035::6815:5186 2606:4700:3032::ac43:a132

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: feedplumb.app
Measured 2026-10-30 16:08:00 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.67.161.50, 104.21.81.134
AAAA (IPv6): 2606:4700:3032::ac43:a132, 2606:4700:3035::6815:5186
www AAAA:    2606:4700:3035::6815:5186, 2606:4700:3032::ac43:a132

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: feedplumb.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::ac43:a132: answers (TCP 443)
    2606:4700:3035::6815:5186: answers (TCP 443)
- www over IPv6: www.feedplumb.app has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::6815:5186: answers (TCP 443)
    2606:4700:3032::ac43:a132: answers (TCP 443)
- Mail servers (MX) have IPv6: Null MX — this domain says it doesn't receive mail.
- 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://feedplumb.app/ via 2606:4700:3032::ac43:a132 -> HTTP 301, certificate: valid
    https://www.feedplumb.app/ via 2606:4700:3035::6815:5186 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/aishi3FQsR

Permanent link: aaaa.bot/r/aishi3FQsR · How we measure

Checked 2026-10-30 16:08:00 UTC. Full DNS report: dns.pizza/domain/feedplumb.app · JSON: /api/v1/feedplumb.app