Below is an example of the Australian 4-State Postal Code:

The Australian Post 4 State barcode is a 4-state barcode. It supports four different formats:

• Standard
• Customer Barcode 2 
• Customer Barcode 3
• Reply Paid Barcode

The Customer Barcodes 2 & 3 include a customer field for encoding data. This barcode also supports the Reed-Solomon error correction scheme.

Format Control Field

The Format Control Field is a 2 digit field identifying the barcode type:

• 11 - Standard Customer Barcode
• 59 - Customer Barcode 2
• 62 - Customer Barcode 3
• 45 - Reply Paid Barcode

Sorting Code

The Sorting Code is an 8 character sorting code (Delivery Point ID).

Customer Information

There is a free format area available in the Customer Barcodes 2 & 3. This will be decoded using the AustralianPostCustomDecodeType.

• If the decode mode is "BarStates" then the output will be either bar state "F" full bar, "T" tracker bar, "A" ascending bar or "D" descending bar.
• If the decode mode is "TableN" then the output will be decoded using the numeric decoding defined in the Australian Post specification.
• If the decode mode is "TableC" then the output will be decoded using the character decoding defined in the Australian Post specification.
• If the decode mode is "NoCustomDecode", then the bars in the custom section are not decoded.
• Use the no custom decode if the decode mode has no custom decode type.