Yes — tree21services.org has IPv6.

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

IPv6 readiness

The www address publishes IPv6 but doesn't answer on it — worse than having none.

Website over IPv6 tree21services.org has an AAAA record and answers on it. ✓ 2a07:7800::138 answers · 443	yes
www over IPv6 www.tree21services.org has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4. ✗ 2a07:7800::138 no answer	broken
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. mx.stackmail.com ✗	no
Nameservers have IPv6 No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS. ns1.webbhost.co.uk ✗ns2.webbhost.co.uk ✗ns3.webbhost.co.uk ✗ns4.webbhost.co.uk ✗	no

HTTPS over IPv6 · not part of the grade yet
tree21services.org didn't complete an HTTPS request over IPv6 (ENETUNREACH).

https://tree21services.org/ via 2a07:7800::138 · ENETUNREACH

What's keeping tree21services.org from an A

Fix or remove the AAAA record for www.tree21services.org
Something published an IPv6 address but nothing answers on it, so IPv6 visitors wait for a timeout first. Either make the server listen on IPv6 (and allow ports 443/80 through its firewall), or delete the AAAA record until it does.
Mail servers without IPv6
mx.stackmail.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.
Nameservers without IPv6
ns1.webbhost.co.uk, ns2.webbhost.co.uk, ns3.webbhost.co.uk, ns4.webbhost.co.uk all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

tree21services.org Has IPv6

A (IPv4)	185.151.30.138
AAAA (IPv6)	2a07:7800::138

www.tree21services.org Has IPv6

A (IPv4)	185.151.30.138
AAAA (IPv6)	2a07:7800::138

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: tree21services.org
Measured 2026-11-02 01:37:13 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    185.151.30.138
AAAA (IPv6): 2a07:7800::138
www AAAA:    2a07:7800::138

Readiness grade F: The www address publishes IPv6 but doesn't answer on it — worse than having none.
- Website over IPv6: tree21services.org has an AAAA record and answers on it.
    2a07:7800::138: answers (TCP 443)
- www over IPv6: www.tree21services.org has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4.
    2a07:7800::138: no answer
- Mail servers (MX) have IPv6: None of the mail servers has an AAAA record.
- Nameservers have IPv6: No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): tree21services.org didn't complete an HTTPS request over IPv6 (ENETUNREACH).
    https://tree21services.org/ via 2a07:7800::138 (ENETUNREACH)
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/ooA0KxKlyR

Permanent link: aaaa.bot/r/ooA0KxKlyR · How we measure

Checked 2026-11-02 01:37:13 UTC. Full DNS report: dns.pizza/domain/tree21services.org · JSON: /api/v1/tree21services.org