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Missouri Driver's License validator
How the Driver's License format works
- Format
- 1 letter + 5-9 digits, digits + up to 2 trailing letters, or a letter-digit-letter hybrid
- Example
- A123456789
Things to watch for
- Format-only check — does not confirm the license actually exists, is valid, or is registered to a real driver
- UNCERTAIN: Missouri has documented several distinct historical formats (letter+digits, digits+letters, letter-digits-letter) — this checker is deliberately permissive across the documented set rather than picking one; flag for extra review
- Runs entirely in your browser — nothing you type is transmitted or stored
^([A-Z]\d{5,9}|\d{8,9}[A-Z]{0,2}|[A-Z]\d{6}[A-Z])$A Missouri driver’s license number is issued by the Missouri Department of Revenue (DOR) — Missouri folds driver licensing into its tax-collection agency rather than running it through a separate motor-vehicle department, which is unusual among US states. Missouri’s documented formats are also unusually varied: a leading letter plus 5 to 9 digits, digits followed by up to two trailing letters, and a letter-digit-letter hybrid pattern have all been described across different sources and issuance eras.
Reading the format
Rather than pick one of those documented shapes as “correct” and reject the others, this checker accepts all three, since real Missouri licenses from different periods can carry any of them. What it still rejects is anything that fits none of the three patterns.
What a pass doesn’t tell you
None of Missouri’s documented shapes include a check digit this tool can verify. A pass confirms only that the string matches one of the known patterns — not that DOR issued it, that the license is current, or that it belongs to a real driver.
Scope: format-only validation across Missouri’s documented format variety, entirely client-side.
Content last reviewed 2026-08-09.
Driver's License FAQ
Why does Missouri have so many different license number formats?
The Missouri Department of Revenue (DOR) — which handles driver licensing alongside its tax duties — has documented several distinct historical formats: a leading letter plus 5-9 digits, digits followed by up to 2 trailing letters, and a letter-digits-letter hybrid. This checker deliberately covers the full documented set.
Which Missouri format is the 'correct' one?
There isn't a single answer — sources describe multiple formats as having been in use, and this checker is intentionally permissive across all of them rather than picking one and risking false rejections on real, older numbers.
Does a valid format confirm the license is currently active?
No. It only confirms the string matches one of the documented shapes, not that DOR has that number on file or that the license is valid.