Welcome to DiploCheck
DiploCheck identifies diplomatic vehicles in seconds and shares fast facts about their home nations. Sign up to collect your spottings, fill your map and climb the ranks of the leaderboard.
Check a Plate
Type or scan a plate
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How it works
U.S. diplomatic plates follow a format set by the Office of Foreign Missions (OFM). Each plate encodes three pieces of information:
The first letter indicates the vehicle type. The two-letter code identifies the country. The numbers identify the vehicle.
The New York reverse format
For diplomats at the United Nations in New York, the format is reversed:
DiploCheck recognizes both formats automatically.
Vehicle types
The Ambassador's car
When the vehicle number is 0001, it belongs to the Ambassador — the highest-ranking diplomat. Spotting one is rare.
Diplomatic vehicles in the U.S.
Washington, D.C. has the largest concentration of diplomatic vehicles in the United States.
These vehicles carry special protections under the Vienna Convention on Diplomatic Relations.
Get in touch
Have a question or spotted an error?
diplocheck@outlook.comTap to upload or drag a photo
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Last updated: April 19, 2026
1. Acceptance of terms
By creating an account or using DiploCheck, you agree to these Terms of Service. If you don't agree, please don't use the service.
2. What DiploCheck is
DiploCheck is a hobby app that helps people identify U.S. diplomatic license plates by looking up the country or organization they're registered to. It's provided for educational and entertainment purposes only.
3. Your account
You're responsible for keeping your password secure and for all activity on your account. You must be at least 13 years old to create an account. Choose a username that isn't offensive, misleading, or impersonates someone else.
4. User-generated content
When you look up plates or upload photos, you're responsible for the content you submit. Don't upload photos containing people's faces or other identifying information without consent. Don't use the service to harass, stalk, or surveil anyone.
5. Privacy and diplomatic vehicles
DiploCheck is designed to identify the country on a plate — not to track individual vehicles or their occupants. Using DiploCheck to harass, follow, or target diplomats is strictly prohibited and may violate federal law.
6. No warranty
DiploCheck is provided "as is." The plate code database is compiled from publicly available sources, including third-party enthusiast databases and community contributions. These sources may be outdated, incomplete, or inaccurate — plate code assignments can change, be reassigned between countries, or be retired without public notice. We make no guarantee that the information returned is correct, current, or complete. DiploCheck is not affiliated with, endorsed by, or sourced directly from any government agency. Don't rely on DiploCheck for legal, official, investigative, journalistic, or security purposes.
7. Limitation of liability
To the fullest extent permitted by law, DiploCheck and its operators aren't liable for any damages arising from your use of the service, including incorrect results, downtime, data loss, or third-party actions.
8. Termination
We may suspend or terminate accounts that violate these terms or misuse the service. You can delete your account at any time by contacting us.
9. Changes to these terms
We may update these terms occasionally. Significant changes will be communicated via the app or by email. Continued use after changes means you accept the updated terms.
10. Contact
Questions? Email diplocheck@outlook.com.
Last updated: April 19, 2026
What we collect
When you create an account, we store your email address, a password hash (we never see your password in plain text), your chosen username, and the date your account was created. When you look up a plate, we record the plate code, country, vehicle type, and a timestamp.
What we don't collect
We don't collect your location, your device information beyond basic browser details, or any photos you upload. Photos are processed by our AI service to read the plate and are not stored.
How we use your data
Your scans power your personal collection, the global leaderboard, and aggregated statistics (like "most spotted countries"). Your username is displayed publicly on the Spotters leaderboard — your email is never shown.
Cookies and storage
We use only strictly necessary cookies and local storage to keep you logged in. We don't use tracking cookies or analytics.
Third parties
Authentication and database services are provided by Supabase. Plate photos are processed by Google's Gemini AI to extract text. Neither service retains identifiable user information from DiploCheck beyond what's needed to provide the service.
Data sources and accuracy
The diplomatic plate code information returned by DiploCheck is compiled from publicly available sources and may contain errors, outdated assignments, or gaps. DiploCheck is independently operated and not affiliated with any government body. Information should be treated as informational only and not relied upon for any official, legal, or decision-making purpose.
Your rights
You can request a copy of your data, correct inaccuracies, or delete your account entirely by emailing diplocheck@outlook.com. Account deletion removes your profile, username, and link between scans and your identity.
Children
DiploCheck isn't intended for children under 13. We don't knowingly collect data from anyone under 13.
Changes to this policy
We'll post any significant changes on this page and update the "Last updated" date.
Contact
Questions? Email diplocheck@outlook.com.