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- IPv6 Test Analyse (warning: in Dutch)
- Tag site and track (Andrew Yourtchenko)
- IPv6 test widget
- IPv6 dual-stack client loss in Norway
- HTML/iframe include to check IPv6 brokenness
- IPv6 validation in JavaScript
- Crisp's IPv6 validation
- Warning broken users with JavaScript
- Geoff Huston's integration with Google Analytics
Test IPv6 readiness of a domain
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