On a U.S. diplomatic license plate, the country codes are the second and third letters of the three-letter prefix, and they are chosen so a passerby cannot identify the country at a glance. France is DJ, Japan is AF, Canada is TG, Germany is LW, China is CY, India is DL, and Mexico is KS. The State Department’s Office of Foreign Missions assigns every code and issues every plate, tracking roughly 11,600 foreign-government vehicles on U.S. roads.1U.S. Department of State. New Diplomatic License Plates Unveiled
How to Read the Plate
Current-issue diplomatic plates carry three letters followed by four numbers. The first letter identifies the driver’s status. The second and third letters are the country code for the foreign mission that owns the vehicle.
So a plate reading DDJ 1234 belongs to a diplomat (D) from France (DJ). Change the first letter and the meaning shifts: CDJ 5678 belongs to a consular officer from the same country. The country code stays put; the status letter in front of it changes with the person.
What the First Letter Tells You
Four status letters appear in the first position, and each corresponds to a different category of foreign mission personnel.
- D marks a diplomat, typically an embassy officer with full diplomatic immunity.
- C marks a consular officer, who has narrower immunity limited to official acts.
- S marks non-diplomatic staff, meaning administrative and technical employees supporting a mission.
- A marks a United Nations Secretariat vehicle.
The status letter matters more than the country code in any legal encounter, because it signals what level of immunity the driver holds. A traffic stop and citation are permitted for all categories under the Vienna Conventions; a stop is not treated as arrest or detention.2U.S. Department of State. Diplomatic and Consular Immunity: Guidance for Law Enforcement and Judicial Authorities
Why the Country Codes Look Random
The codes deliberately avoid the abbreviations you would expect. Germany is not GE or DE but LW. The United Kingdom is not UK or GB. China is CY, not CN. The State Department designed the system this way as a security measure for foreign personnel: a bystander reading a plate in traffic should not be able to identify the country instantly.
A few structural rules shape the assignments:
- The letters E and O never appear anywhere in the two-letter pair, likely to avoid confusion with the numerals 3 and 0 at a distance.
- The letters I and Z never appear in the first position of the pair.
- Every code is unique. No two missions share an identifier.
Beyond those constraints, the assignments look arbitrary. Most countries hold a single code. A handful of larger missions hold multiple codes to cover their fleet size; Israel, for example, uses several distinct pairs.
International organizations receive codes in the same format. The United Nations, the Organization of American States, and similar bodies are assigned two-letter identifiers under the same scheme as sovereign nations.
Plates Without a Country Code
A few specialty plates fall outside the three-letter, four-number pattern and carry no country code.
Trailers registered to foreign missions use a separate T designation. Disabled individuals receive plates marked HP with the international wheelchair symbol. If you are looking at either of those plate types, you will not find a country code embedded in the sequence.
Who Issues the Plates
Every diplomatic plate in the United States comes from the federal government, not a state DMV. The Office of Foreign Missions handles vehicle registration and driver licensing for foreign mission members directly. The legal authority comes from the Diplomatic Relations Act (22 U.S.C. §§ 254a–254e), which implements the Vienna Convention, and the Foreign Missions Act (22 U.S.C. §§ 4301–4316), which gives OFM its operational power to regulate registration and impose penalties.3Office of the Law Revision Counsel. 22 U.S.C. Chapter 6 – Foreign Diplomatic and Consular Officers
Once a mission submits its paperwork, OFM issues a registration card, plates, and a validation decal good for one year.4U.S. Department of State. Registration and Titling Anyone who tries to register a mission vehicle through a state DMV, or drives one without OFM registration, faces a $100 service fee per vehicle on top of standard registration when they come into compliance.5U.S. Department of State. Service Fee Circular Reissuance Centralizing the system in one federal office is what makes the country-code scheme possible: a single issuer means every plate follows the same format and no code gets duplicated.
What the Plate Signals About Immunity
The country code identifies the mission, but the first letter is what determines how far the driver’s immunity extends. Two treaties govern: the 1961 Vienna Convention on Diplomatic Relations and the 1963 Vienna Convention on Consular Relations.
A D plate holder — a full diplomatic agent — has complete personal inviolability. They cannot be handcuffed, arrested, or detained. Their vehicle and residence cannot be searched. They have absolute immunity from criminal prosecution in U.S. courts regardless of the alleged offense, unless the sending government waives that immunity.2U.S. Department of State. Diplomatic and Consular Immunity: Guidance for Law Enforcement and Judicial Authorities
A C plate holder — a consular officer — has far narrower protection. Consular immunity covers only official acts performed in consular duties. Outside that scope, a consular officer can be arrested for a felony on a warrant from a competent court and can be prosecuted for misdemeanors while remaining free pending trial. Whether a specific act qualifies as “official” is a question only a court can decide; the officer, the consulate, and the State Department cannot resolve it unilaterally.2U.S. Department of State. Diplomatic and Consular Immunity: Guidance for Law Enforcement and Judicial Authorities
S plate holders occupy a middle ground. Their immunity varies with whether they serve an embassy or a consulate and with the specific terms of their accreditation, and in practice is narrower than that of the diplomat or consular officer they support.
None of this makes traffic laws optional. Traffic stops and citations are always permitted, and mission members are expected to resolve tickets through payment, court, or local adjudication. The Office of Foreign Missions runs its own demerit point system that can suspend or revoke driving privileges, and repeat offenses or a DUI can lead the State Department to request that the individual leave the country.6U.S. Department of State. OFM Enforcement of Moving Violations