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Privacy & Legal Notice

Last updated: 10 November 2026

In short

  • Container numbers you type or paste are checked only in your browser. They are never sent to a server.
  • ContainerCheck uses no cookies, no analytics and no tracking, and it loads nothing from third parties.
  • The only personal data involved is the technical data your browser sends to the hosting provider when it loads the site, such as your IP address.

Who is responsible

ContainerCheck is a non-commercial project run by a private individual:
José Oldemar Chaves Urbina, Finland
Email: jose.chaves@irazu.fi

He is the data controller under the EU General Data Protection Regulation (GDPR) and the Finnish Data Protection Act (1050/2018).

Hosting and server logs

The site is delivered by Cloudflare (Cloudflare Pages). When your browser loads a page, Cloudflare processes the technical data needed to deliver it and protect it against attacks: your IP address, the date and time, the requested URL, your browser's user-agent and similar request data.

  • Purpose: delivering the website securely and reliably.
  • Legal basis: legitimate interest, GDPR Article 6(1)(f).
  • Processor: Cloudflare acts as a processor under its data processing addendum. Some processing may take place outside the EU/EEA. Cloudflare covers these transfers with the European Commission's Standard Contractual Clauses and its certification under the EU–U.S. Data Privacy Framework.
  • Retention: the site owner does not collect or keep these logs. Cloudflare keeps them only as long as it needs them for delivery and security, as described in the Cloudflare privacy policy.

What is stored on your device

ContainerCheck sets no cookies and does not use localStorage, sessionStorage or IndexedDB. To work offline, your browser keeps a copy of the site's own files (HTML, styles, scripts, fonts and icons) in its cache through a service worker. This copy contains no personal data and nothing you typed. It is only used to show this site. You can delete it at any time from your browser's site settings.

Your rights

You have the right to request access to, rectification or erasure of your personal data. You can also ask to restrict its processing, and you can object to it. Because the site owner holds no personal data about visitors, most requests concern Cloudflare's technical logs. Contact the email above and your request will be answered within one month.

You can also lodge a complaint with the Finnish supervisory authority, the Data Protection Ombudsman (Tietosuojavaltuutetun toimisto).

Legal notice and disclaimer

  • ContainerCheck is a free tool provided as is, without warranty. Check results against your official shipping documents before relying on them.
  • The tool checks the ISO 6346 check digit and format only. It does not check whether an owner code is registered in the BIC Code register.
  • ContainerCheck is not affiliated with the Bureau International des Containers (BIC) or with ISO. BIC and ISO are trademarks of their respective owners.
  • The source code is published under the MIT License.

Accessibility

ContainerCheck aims to meet WCAG 2.2 level AA. If something does not work for you with a keyboard, screen reader, zoom or print, please write to jose.chaves@irazu.fi.