--- title: "UK Number Plate Formats Explained | Buy Private Plates" description: "Dateless, suffix, prefix, current & Northern Irish plates explained. Read the year, region and rules from any UK registration with tables and a free year checker." url: https://buyprivateplates.uk/number-plate-formats/ site: "Buy Private Number Plates Online – Instantly Search the DVLA Database" published: 2026-09-29 modified: 2026-09-29 language: en-GB --- # Number Plate Formats The complete guide ## UK Number Plate Formats Explained Dateless, suffix, prefix, current style and Northern Irish: how each format came about, how to read the year and region from any plate, and which registrations can go on your car. [Check a plate's year](https://buyprivateplates.uk/number-plate-year-checker/) [Search private plates](https://buyprivateplates.uk/private-number-plates/) Timeline ## Over a century of registrations Five formats, one system. Northern Ireland has kept the dateless style throughout. 1. 1903 A 1 **Dateless** A 1 issued in London. Letters identify the county, numbers run 1–9999. 2. 1932 ABC 123 **Three letters** Busy counties add a third letter: ABC 123, later reversed to 123 ABC. 3. 1963 ABC 123A **Suffix** A year letter is added to the end. Changes every August from 1967. 4. 1983 A123 ABC **Prefix** The year letter moves to the front. Six-monthly changes from 1999. 5. 2001 AB51 CDE **Current** Memory tag, two-digit age identifier, three random letters. Runs to 2050. Format guides ## Every Format, Explained in Depth History, year tables, regional codes, eligibility rules and buying tips for each. 1903 – 1963 ### Dateless Number Plates The oldest, most prestigious registrations on British roads: what they are, how they were issued, how to read one, and why they can go on a car of any age. [Read the full guide →](https://buyprivateplates.uk/number-plate-formats/dateless/) 1963 – 1983 ### Suffix Number Plates The first plates to carry a year letter. Read the suffix table, learn which letters were skipped and why, and see which vehicles can carry one today. [Read the full guide →](https://buyprivateplates.uk/number-plate-formats/suffix/) 1983 – 2001 ### Prefix Number Plates Eighteen years of A123 ABC. Decode the year letter, see why the system went six-monthly in 1999, and find out which cars a prefix plate can go on. [Read the full guide →](https://buyprivateplates.uk/number-plate-formats/prefix/) 2001 – today ### Current Style Number Plates The AB51 CDE system: how the two-digit age identifier works, what the memory tag tells you about where a car was registered, and which letters you will never see. [Read the full guide →](https://buyprivateplates.uk/number-plate-formats/current/) Dateless · any vehicle ### Northern Irish Number Plates The I and Z plates: why they have never carried an age identifier, how to read the county code, and why they are the best-kept secret for putting a private plate on any car. [Read the full guide →](https://buyprivateplates.uk/number-plate-formats/ni/) Quick decoder ## How to read any UK plate in ten seconds 1. **Two letters, two numbers, three letters (AB51 CDE)?** Current style. The numbers are the age identifier; March issues use the year, September issues add 50. 2. **One letter, numbers, three letters (A123 ABC)?** Prefix, 1983 to 2001. The first letter is the year. 3. **Three letters, numbers, one letter (ABC 123A)?** Suffix, 1963 to 1983. The last letter is the year. 4. **Letters and numbers with no single year letter, containing I or Z?** Northern Irish. Dateless, fits any vehicle. 5. **Anything else with no year letter?** Dateless, pre-1963. Fits any vehicle. [Use the number plate year checker](https://buyprivateplates.uk/number-plate-year-checker/) Formats in general ## Number Plate Formats: Common Questions **How many number plate formats are there in the UK?** Five families: dateless (pre-1963), suffix (1963–83), prefix (1983–2001), current style (2001 onward) and Northern Irish, which has stayed dateless throughout. **Which format can go on any car?** Dateless and Northern Irish plates, because they carry no age identifier. Suffix, prefix and current plates can only go on vehicles registered in or after the period the identifier represents. **Why are the letters I, O, Q, U and Z missing from some plates?** I and Z were reserved for Ireland, Q for vehicles of unknown age, and O and U were dropped as year letters because they resemble 0 and V. Each guide lists exactly which letters its format skipped. **Can I change the format when I transfer a plate?** No. A registration keeps its format for life. You can move it between eligible vehicles but you cannot alter its letters, numbers or spacing. **Where can I check what year a plate is?** Use our free number plate year checker: type the registration and it returns the format, the issue period and the earliest vehicle it can be assigned to. ## Found Your Format? Find Your Plate. Search 72 million live DVLA registrations by format, name or initials. Every price includes the £80 DVLA fee and full transfer service. [Search private plates](https://buyprivateplates.uk/private-number-plates/) [Value a plate free](https://buyprivateplates.uk/plate-value-checker/) --- Source: https://buyprivateplates.uk/number-plate-formats/