Australian Branch Routing Code

Identifies Australian Bank State Branch (BSB) routing codes in 3-digit dash 3-digit or continuous 6-digit formats. Supports space separator. Requires corroborative financial-institution keywords.

Type

regex

Engine

universal

Confidence

low

Confidence justification

Low confidence: 6-digit numbers are ubiquitous. Financial-institution keywords are essential.

Jurisdictions

au

Regulations

AML/CTF Act (Cth), IPA 2009 (Qld), NDB Scheme (Cth), Privacy Act 1988 (Cth), SOCI Act 2018 (Cth)

Frameworks

ISO 27001, ISO 27701, PCI-DSS, SOC 2

Data categories

pii, financial

Scope

wide

Risk rating

9

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{3}[\-\s]?\d{3}\b

Corroborative evidence keywords

BSB, bank state branch, branch number, routing code, account number, bank account, account no, routing number, sort code, IBAN, SWIFT, BIC

Proximity: 300 characters

Should match

• 062-000 — CBA BSB with hyphen separator
• 012345 — BSB as 6 continuous digits
• 923-100 — Credit union BSB with hyphen
• 062 000 — BSB with space separator

Should not match

• 06-200 — Only 2 digits before hyphen
• 0621-00 — 4 digits before hyphen
• 06200A — Contains a letter

Known false positives

• 6-digit reference codes, postcodes, or dates in non-financial contexts. Mitigation: Require financial-institution keywords in proximity.

References

• Australia bank account number entity definition - Microsoft Learn

Collections

• Australian Government IDs