Yes — startwork.cv has IPv6.

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

This is a saved measurement from 2026-11-04 01:42 UTC. Check startwork.cv live now

IPv6 readiness

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

Website over IPv6 startwork.cv has an AAAA record and answers on it. ✓ 2600:1900:4001:96e:8000:1:7aa2:5d7d answers · 443	yes
www over IPv6 www.startwork.cv has an AAAA record and answers on it. ✓ 2600:1900:4001:96e:8000:1:7aa2:5d7d answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. mx1.csof.net ✗mx2.csof.net ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1.hwrn.net ✓ns2.hwrn.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
The certificate served over IPv6 at 2600:1900:4001:96e:8000:1:7aa2:5d7d isn't valid for startwork.cv: DEPTH_ZERO_SELF_SIGNED_CERT.

https://startwork.cv/ via 2600:1900:4001:96e:8000:1:7aa2:5d7d · DEPTH_ZERO_SELF_SIGNED_CERT

problem

What's keeping startwork.cv from an A

The certificate served over IPv6 is wrong
The certificate served over IPv6 at 2600:1900:4001:96e:8000:1:7aa2:5d7d isn't valid for startwork.cv: DEPTH_ZERO_SELF_SIGNED_CERT. Often the IPv6 address points at a different server (or an old one) than IPv4 does. Make sure 2600:1900:4001:96e:8000:1:7aa2:5d7d serves the same certificate as your IPv4 address.
Mail servers without IPv6
mx1.csof.net, mx2.csof.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

startwork.cv Has IPv6

A (IPv4)	34.41.139.193
AAAA (IPv6)	2600:1900:4001:96e:8000:1:7aa2:5d7d

www.startwork.cv Has IPv6

A (IPv4)	34.41.139.193
AAAA (IPv6)	2600:1900:4001:96e:8000:1:7aa2:5d7d

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: startwork.cv
Measured 2026-11-04 01:42:08 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    34.41.139.193
AAAA (IPv6): 2600:1900:4001:96e:8000:1:7aa2:5d7d
www AAAA:    2600:1900:4001:96e:8000:1:7aa2:5d7d

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: startwork.cv has an AAAA record and answers on it.
    2600:1900:4001:96e:8000:1:7aa2:5d7d: answers (TCP 443)
- www over IPv6: www.startwork.cv has an AAAA record and answers on it.
    2600:1900:4001:96e:8000:1:7aa2:5d7d: 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): The certificate served over IPv6 at 2600:1900:4001:96e:8000:1:7aa2:5d7d isn't valid for startwork.cv: DEPTH_ZERO_SELF_SIGNED_CERT.
    https://startwork.cv/ via 2600:1900:4001:96e:8000:1:7aa2:5d7d, certificate: DEPTH_ZERO_SELF_SIGNED_CERT
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/bHpitW9ULn

Permanent link: aaaa.bot/r/bHpitW9ULn · How we measure

Checked 2026-11-04 01:42:08 UTC. Full DNS report: dns.pizza/domain/startwork.cv · Age, certificate and blocklists: how.is/startwork.cv · JSON: /api/v1/startwork.cv