Luxembourg Driver's License Number

Detects Luxembourg driver's license number patterns. This pattern is based on a Microsoft Purview built-in sensitive information type. Users already running Purview may prefer to enable the built-in SIT directly, or use this version as a starting point for customisation.

Type: regex
Engine: universal
Confidence: medium
Confidence justification: Medium confidence: pattern has structural constraints but corroborative keywords are recommended to reduce false positive rates.
Detection quality: Mixed
Jurisdictions: lu, eu
Regulations: BDSG, CNIL / LIL, GDPR
Frameworks: ISO 27001, ISO 27701
Data categories: pii, government-id
Scope: narrow
Risk rating: 6
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{6}\b

Corroborative evidence keywords

driver, licence, license, driving, DL, ID number, identification, ID card, permit, registration, certificate

Proximity: 300 characters

Should match

123456 — Standard 6-digit Luxembourg driver's license number
987654 — Another valid 6-digit format
012345 — 6-digit number with leading zero

Should not match

12345 — Too few digits (5 instead of 6)
1234567 — Too many digits (7 instead of 6)

Known false positives

Generic numeric sequences matching the driver's license format appearing in unrelated contexts. The short 6-digit format has a higher false positive rate than longer patterns. Mitigation: Require corroborative evidence keywords within the proximity window to confirm driver's license context.

References

Luxembourg driver's license number entity definition - Microsoft Learn