Yes — sinkingfeeling.online has IPv6.

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

This is a saved measurement from 2026-10-30 18:02 UTC. Check sinkingfeeling.online live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
sinkingfeeling.online has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3030::ac43:c992 answers · 443✓ 2606:4700:3035::6815:34ac answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mx01.mail.icloud.com ✗mx02.mail.icloud.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
amalia.ns.cloudflare.com ✓ishaan.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 403.
https://sinkingfeeling.online/ via 2606:4700:3030::ac43:c992 → 403
works

What's keeping sinkingfeeling.online from an A

  1. Mail servers without IPv6
    mx01.mail.icloud.com, mx02.mail.icloud.com have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

sinkingfeeling.online  Has IPv6

A (IPv4)172.67.201.146
104.21.52.172
AAAA (IPv6)2606:4700:3030::ac43:c992
2606:4700:3035::6815:34ac

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/5ottrJ5Lp4 · How we measure

Checked 2026-10-30 18:02:04 UTC. Full DNS report: dns.pizza/domain/sinkingfeeling.online · JSON: /api/v1/sinkingfeeling.online