⚠️ Caution: This is an early demo of our test updates for NCSC's 2025 TLS guidelines, to allow you to test against the new guidelines.

Some explanation text is still missing, out of date, or in rough draft state. Test evaluations may still change.
This URL is an active development environment and has limited availability - it may be down for hours or days.

Tests from this instance originate from different IPs than those used in production. If you use allowlisting on our production IPs, results may vary, particularly for email TLS. To include this instance, allowlist 62.204.66.0/26 and 2a00:d00:ff:162::/64.

Batch API and web-based dashboard

Besides the website for testing individual domain names, Internet.nl also provides the following tooling that can be used for testing multiple domain names:

Examples of use

For some examples of organisations using Internet.nl's API and web-based dashboard see "Measurements using Internet.nl".

Attribution

If you re-use the Internet.nl test results in your own website or service, we kindly ask you for attribution. For more information see "terms of use" and "copyright".