What are the main Mexican plate formats?

Three private-car layouts dominate: the older standard of 3 letters + 3 digits (ABC-123), the high-volume Mexico City layout of 3 letters + 4 digits (ABC-1234), and the 2023 federal redesign using 3 digits + 3 letters (123-ABC). Commercial plates use 2 letters + 5 digits.

Does Mexico use a check digit?

No. Unlike VAT or IBAN numbers, Mexican plates have no nationwide check-digit algorithm. Each of the 32 states issues its own sequential series, so a format validator confirms layout, not a mathematical checksum.

Can this confirm a plate is registered?

No. This is a format validator only. To confirm a plate belongs to a registered vehicle you must query the relevant state's vehicle registry (Registro Público Vehicular / REPUVE).

Why does my CDMX plate have four digits?

Mexico City and other high-volume states ran out of combinations under the 3-letter + 3-digit scheme, so they adopted a 3-letter + 4-digit layout to expand capacity. The validator recognises both.

Are hyphens required?

No. The validator strips hyphens and spaces before checking, so ABC123, ABC-123, and ABC 123 are all treated the same.

Mexico License Plate Format Validator

Mexico does not use a single national license-plate algorithm — instead, 32 states each issue their own sequential series, and the layout itself has changed across generations. This free validator checks a plate against the canonical Mexican formats and tells you which generation it matches. It is built for logistics, fleet, and insurance workflows that need a quick structural check.

How it works

There is no check digit to verify, so the tool works by pattern matching the normalised plate (uppercased, hyphens and spaces removed) against the recognised layouts:

Standard private: 3 letters + 3 digits — ABC-123 (1990s–2000s scheme, still in circulation).
Mexico City / high-volume state: 3 letters + 4 digits — ABC-1234 (added capacity once the 3+3 space was exhausted).
2023 federal redesign: 3 digits + 3 letters — 123-ABC.
Commercial / cargo: 2 letters + 5 digits — AB-12345.

If the input matches any pattern, the tool reports the matching generation; otherwise it flags the plate as not a recognised format.

Notes and example

Because the system is series-based rather than checksum-based, a “valid format” result only confirms the structure is correct, not that the plate is registered to a vehicle. For example, ABC-1234 validates as a Mexico City layout, while 12-ABC fails because no canonical Mexican format mixes counts that way.

To confirm a plate corresponds to a real, registered vehicle, query the relevant state registry or the national REPUVE database. All processing here happens locally in your browser — the plate is never sent anywhere.