Browser storage
The site may save your light/dark theme preference in local storage under metro-coding-theme. You can remove it in your browser’s site-data settings. The checker does not store plate digits, dates or results.
We save your analytics choice under number-coding-analytics. Google Analytics loads only when you choose Allow analytics. If browser storage is blocked, your choice applies to the current page and may be requested again on a later visit.
Optional Google Analytics
We use Google Analytics 4 to understand page visits, traffic sources and engagement with this guide. Before you allow analytics, we do not load Google’s analytics tag or send analytics events. The checker works with either choice.
When allowed, Google receives page titles and page addresses without query strings or fragments, the referring website’s origin, and technical browser, device and connection information. Google can receive your IP address as part of those network requests. We do not send plate digits, travel dates, selected road rules or checker results as analytics events. Automatic form and outbound-link tracking are disabled.
Analytics can use first-party _ga cookies to distinguish visits. We set their expiry to up to six months; later activity can extend that expiry. Advertising storage, advertising user data, advertising personalisation and Google signals are disabled in our tag configuration. We have not added advertising or account registration to this site.
Use Analytics choices in the footer to allow or turn off analytics. Turning off an active tag removes its accessible first-party cookies and reloads the page. Refresh other open tabs for the updated choice to apply there. This stops future collection from this browser; it does not erase data Google already received. Google’s privacy policy explains its processing. You can also use Google’s Analytics opt-out browser add-on.
Website and source-status requests
Your browser requests pages and assets from our hosting infrastructure. Serving those requests makes connection information such as your IP address, request path and browser headers available to the provider. This browser-only checker is not a promise that hosting providers keep no technical logs.
The site also requests /api/source-checks from the same website to retrieve updated source-monitoring status. That request contains no plate digit, selected date or checker result. The server retrieves source observations from GitHub; it does not forward visitor IP addresses or browser headers to GitHub.
We have not established a separate retention period for provider-managed technical logs. Hosting providers may process this information for service delivery, security and troubleshooting under their own retention practices.
Official-source links
Opening a government or other source link takes you to that provider’s website, where its own privacy practices apply. External links use a no-referrer policy. We do not send your checker entries with those links.
Policy changes
The date at the top identifies this policy’s latest revision. The editorial and corrections page explains how the guide handles evidence updates. This site currently provides no account or public submission form.