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United Kingdom Passport Number validator
How the passport number format works
- Format
- 9 digits, no letters
- Example
- 502135889
Things to watch for
- Format-only check — does not confirm the passport was actually issued, is unexpired, or is currently valid
- Purely numeric — a UK passport number never contains letters, unlike many other countries' passports
- Validation runs entirely in your browser — the number you enter is never transmitted or stored
^[0-9]{9}$A UK passport number is 9 digits and nothing else — no letters, no hyphens — e.g. 502135889, issued by HM Passport Office, part of the Home Office. That’s a genuine point of difference from many other countries in this list: Germany, France, Italy, and dozens of others build letters into their passport numbers, while the UK’s stays purely numeric.
What this checker verifies
This tool confirms the input is exactly 9 digits once spaces are stripped, which catches an obvious typo — a missing digit, a letter mistakenly included, or extra characters carried over from a scan of the passport’s machine-readable zone (MRZ), where the number also appears alongside other encoded fields.
What a pass doesn’t confirm
UK passport numbers carry no check digit this tool can recompute, so matching the 9-digit shape is the strongest signal a client-side check can give. A pass doesn’t confirm HM Passport Office actually issued that number, that the passport is unexpired, or that it belongs to a real holder — and this tool never decodes or stores what you enter.
Scope: format-only validation, running entirely in your browser.
Content last reviewed 2026-08-09.
passport number FAQ
What does a UK passport number look like?
It's 9 digits with no letters, e.g. 502135889, issued by HM Passport Office, part of the UK Home Office. That's unlike many countries' passports, which mix letters and digits.
Does this tool confirm the passport is valid?
No — it only confirms the input is exactly 9 digits. Confirming the passport was actually issued, is unexpired, or is currently valid requires HM Passport Office's own records.
Is my passport number stored anywhere?
No. Everything runs locally in your browser; nothing you type is transmitted or saved.