What are the three UK plate formats?

Suffix style (1963–1983) like ABC 123D ends in a year letter; prefix style (1983–2001) like A123 BCD starts with a year letter; and the current style (2001 onwards) like AB12 CDE uses a 2-letter area tag, a 2-digit age identifier, and 3 random letters.

How does the current-style age identifier work?

The two digits encode a six-month period. March to August plates use the year's last two digits (2023 becomes 23), while September to February plates add 50 (September 2023 to February 2024 becomes 73).

What is the memory tag?

The first two letters of a current-style plate are the memory tag. The first letter identifies the DVLA region (such as L for London or S for Scotland) and both letters together identify the specific local office that issued the plate.

Does a valid format mean the plate exists?

No. This tool checks structure and decodes region and year. It cannot confirm a plate is currently assigned to a registered vehicle — that requires a DVLA lookup.

No. The validator removes spaces before checking, so AB12CDE and AB12 CDE are treated identically.

UK Vehicle Registration Plate Validator

A UK vehicle registration (“number plate”) encodes more than an arbitrary serial — for current-style plates it carries the issuing region and the registration period. This free validator confirms a plate matches one of the three historical UK formats and decodes the region and year where possible. It is built for fleet management, vehicle history, and insurance workflows.

How it works

The tool normalises the input (uppercased, spaces removed) and tests it against three patterns:

Current style (2001+): AB12 CDE — 2 area letters, 2 age digits, 3 random letters.
Prefix style (1983–2001): A123 BCD — a leading year letter, 1–3 digits, 3 area letters.
Suffix style (1963–1983): ABC 123D — 3 area letters, 1–3 digits, a trailing year letter.

For the current style it decodes two things. The memory tag (first two letters) maps the first letter to a DVLA region. The age identifier (two digits) maps to a six-month period: values 01–49 are March–August of 20nn, while 51–99 are September–February starting in 20(nn−50).

Example

Decode AB12 CDE:

Memory tag    = AB        -> A = Anglia region
Age identifier = 12       -> Mar–Aug 2012
Random letters = CDE

A plate like LT73 XYZ decodes to the London region, registered September 2023 to February 2024.

Notes

A valid result confirms the plate’s structure and reveals its region and registration period; it does not confirm the plate is currently assigned to a vehicle. For that you need an official DVLA lookup. All decoding runs locally in your browser — the plate is never sent anywhere.