CloudSpex

Free DNS tool

IPv6 Readiness Checker

See whether people on IPv6-only networks can reach your website, deliver mail to you and resolve your domain.

Instant result, no email needed.

Three parts, checked separately

Website: AAAA records for the domain and www, and an HTTPS request over IPv6. Mail: AAAA records for each MX host. DNS: AAAA records for each nameserver. The HTTPS request is made from CloudSpex's own network; if that network cannot reach IPv6, the page says so instead of blaming the site.

For every record on one name, use the DNS Lookup.

Frequently asked questions

Do I need IPv6?

Most networks still have IPv4, so a site without IPv6 is reachable for nearly everyone. Mobile networks increasingly run IPv6-first, and some government and enterprise policies require it.

Why does the apex differ from www?

They are separate names with separate records. A common gap is an AAAA record on www only, or on the apex only.

What does 'not tested from our network' mean?

The site has AAAA records, but the HTTPS request over IPv6 could not leave CloudSpex's network. That says nothing about the site; the records are still shown.

Adding IPv6 creates a second path that can break on its own.

Add your domain to CloudSpex to monitor its DNS and HTTPS continuously.

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