Australia CRN Generator
Customer Reference Number (CRN - Centrelink / Services Australia) generator for welfare and benefits QA.
Waiting for generation...
About the Customer Reference Number (CRN)
The Customer Reference Number (CRN) is a 9-digit plus 1-letter identifier issued by Services Australia to access welfare, pensions, and social support services via Centrelink.
It is required for Australian government payments such as JobSeeker, Family Tax Benefit, Age Pension, and Child Care Subsidy.
CRN Check Letter Calculation Algorithm
The 10th position (check letter) is obtained by multiplying the first 9 digits by weights [9, 8, 7, 6, 5, 4, 3, 2, 1]:
Sum = Σ (dᵢ × Wᵢ); Remainder = Sum mod 11; Letter = LETTER_TABLE[Remainder]
- Multiply each of the first 9 digits by decreasing weights [9, 8, 7, 6, 5, 4, 3, 2, 1].
- Sum all 9 products.
- Calculate the remainder of the sum divided by 11 (values 0 to 10).
- Map the remainder to the official letter table: 0→A, 1→B, 2→C, 3→D, 4→E, 5→F, 6→H, 7→J, 8→K, 9→L, 10→T.