Australian Company Number
Detects Australian Company 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
- high
- Confidence justification
- High confidence: validated with Modified Mod 10 with weights [8,7,6,5,4,3,2,1] and supported by corroborative keyword evidence.
- Jurisdictions
- au
- Regulations
- AML/CTF Act (Cth), NDB Scheme (Cth), Privacy Act 1988 (Cth)
- Frameworks
- ISO 27001
- Data categories
- pii, government-id
- Scope
- narrow
- Risk rating
- 5
- Platform compatibility
- Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible
Pattern
\b\d{3}\s?\d{3}\s?\d{3}\bCorroborative evidence keywords
ACN, australian company number, company number, ASIC
Proximity: 300 characters
Should match
123 456 789— Standard spaced format (3-3-3)123456789— Continuous digits004 085 616— Real ACN format
Should not match
12345678— Only 8 digits1234567890— 10 digits, exceeds ACN length
Known false positives
- Common words and phrases related to australian company number appearing in policy documents, training materials, HR templates, or compliance guidelines without actual personal data. Mitigation: Require corroborative evidence keywords within the proximity window to confirm sensitive data context rather than general discussion.
- In Australian English, similar terminology used in formal or administrative contexts (education, professional documentation) that does not constitute sensitive data collection. Mitigation: Layer with additional contextual signals such as structured identifiers, form fields, or database column headers to distinguish sensitive records from general references.