Yes — zarzan.org has IPv6.

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

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 zarzan.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::ac43:b158 answers · 443✓ 2606:4700:3032::6815:4392 answers · 443	yes
www over IPv6 www.zarzan.org has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3032::6815:4392 answers · 443✓ 2606:4700:3037::ac43:b158 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. witcher.mxrouting.net ✗witcher-relay.mxrouting.net ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. kenia.ns.cloudflare.com ✓phil.ns.cloudflare.com ✓	yes

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

https://zarzan.org/ via 2606:4700:3037::ac43:b158 → 200

works

What's keeping zarzan.org from an A

Mail servers without IPv6
witcher.mxrouting.net, witcher-relay.mxrouting.net 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

zarzan.org Has IPv6

A (IPv4)	104.21.67.146 172.67.177.88
AAAA (IPv6)	2606:4700:3037::ac43:b158 2606:4700:3032::6815:4392

www.zarzan.org Has IPv6

A (IPv4)	104.21.67.146 172.67.177.88
AAAA (IPv6)	2606:4700:3032::6815:4392 2606:4700:3037::ac43:b158

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: zarzan.org
Measured 2026-11-12 05:01:05 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.67.146, 172.67.177.88
AAAA (IPv6): 2606:4700:3037::ac43:b158, 2606:4700:3032::6815:4392
www AAAA:    2606:4700:3032::6815:4392, 2606:4700:3037::ac43:b158

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: zarzan.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3037::ac43:b158: answers (TCP 443)
    2606:4700:3032::6815:4392: answers (TCP 443)
- www over IPv6: www.zarzan.org has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3032::6815:4392: answers (TCP 443)
    2606:4700:3037::ac43:b158: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers 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://zarzan.org/ via 2606:4700:3037::ac43:b158 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/iZwxbuHjrK

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

Checked 2026-11-12 05:01:05 UTC. Full DNS report: dns.pizza/domain/zarzan.org · Age, certificate and blocklists: how.is/zarzan.org · JSON: /api/v1/zarzan.org