Yes — calcsbase.com has IPv6.

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

This is a saved measurement from 2026-10-31 09:34 UTC. Check calcsbase.com live now

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
calcsbase.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3033::ac43:a6ce answers · 443✓ 2606:4700:3037::6815:31c7 answers · 443
yes
www over IPv6
www.calcsbase.com has 2 IPv6 addresses and answers on every one we tested.
✓ 2606:4700:3033::ac43:a6ce answers · 443✓ 2606:4700:3037::6815:31c7 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
_dc-mx.0e2562d46b3b.calcsbase.com ✗
no
Nameservers have IPv6
2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
april.ns.cloudflare.com ✓max.ns.cloudflare.com ✓
yes
HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.
https://calcsbase.com/ via 2606:4700:3033::ac43:a6ce → 200
works

What's keeping calcsbase.com from an A

  1. Mail servers without IPv6
    _dc-mx.0e2562d46b3b.calcsbase.com has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

calcsbase.com  Has IPv6

A (IPv4)172.67.166.206
104.21.49.199
AAAA (IPv6)2606:4700:3033::ac43:a6ce
2606:4700:3037::6815:31c7

www.calcsbase.com  Has IPv6

A (IPv4)172.67.166.206
104.21.49.199
AAAA (IPv6)2606:4700:3033::ac43:a6ce
2606:4700:3037::6815:31c7

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/PGxPX5qrsO · How we measure

Checked 2026-10-31 09:34:00 UTC. Full DNS report: dns.pizza/domain/calcsbase.com · JSON: /api/v1/calcsbase.com