Yes — nkfdp.info has IPv6.

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

This is a saved measurement from 2026-11-05 02:00 UTC. Check nkfdp.info live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 nkfdp.info has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:d2be answers · 443✓ 2606:4700:3032::6815:2d42 answers · 443	yes
www over IPv6 www.nkfdp.info has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:d2be answers · 443✓ 2606:4700:3032::6815:2d42 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. kaiser.ns.cloudflare.com ✓piper.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Redirects to www.tiktok.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.

https://nkfdp.info/ via 2606:4700:3037::ac43:d2be → 301https://www.tiktok.com/explore · redirects to www.tiktok.com, which has no IPv6 address

problem

Nothing keeping you from an A

A redirect leads off IPv6
Redirects to www.tiktok.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all. Give the redirect target IPv6 too, or redirect somewhere that has it.

Check again

nkfdp.info Has IPv6

A (IPv4)	104.21.45.66 172.67.210.190
AAAA (IPv6)	2606:4700:3037::ac43:d2be 2606:4700:3032::6815:2d42

www.nkfdp.info Has IPv6

A (IPv4)	172.67.210.190 104.21.45.66
AAAA (IPv6)	2606:4700:3037::ac43:d2be 2606:4700:3032::6815:2d42

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: nkfdp.info
Measured 2026-11-05 02:00:57 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.45.66, 172.67.210.190
AAAA (IPv6): 2606:4700:3037::ac43:d2be, 2606:4700:3032::6815:2d42
www AAAA:    2606:4700:3037::ac43:d2be, 2606:4700:3032::6815:2d42

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: nkfdp.info has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:d2be: answers (TCP 443)
    2606:4700:3032::6815:2d42: answers (TCP 443)
- www over IPv6: www.nkfdp.info has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:d2be: answers (TCP 443)
    2606:4700:3032::6815:2d42: 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): Redirects to www.tiktok.com, which has no IPv6 address — so IPv6 visitors end up needing IPv4 after all.
    https://nkfdp.info/ via 2606:4700:3037::ac43:d2be -> HTTP 301, certificate: valid
    https://www.tiktok.com/explore (redirects to www.tiktok.com, which has no IPv6 address)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/_RPdFxNsMy

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

Checked 2026-11-05 02:00:57 UTC. Full DNS report: dns.pizza/domain/nkfdp.info · Age, certificate and blocklists: how.is/nkfdp.info · JSON: /api/v1/nkfdp.info