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There are two types of 4 State barcodes on printed postage 1st class and 2nd class with English and Bilingual Welsh / English options.
- Barcode L, which is a Long barcode for domestic sorted and unsorted customers.
- Number of Bars: 78
- Physical Size: Approximately 89 mm (at 21.2 bars per inch)
- Content: 26 Characters
- Barcode C, which is a domestic sorted Consolidator customer.
- Number of Bars: 66
- Physical Size: Approximately 76.2 mm (at 21.2 bars per inch)
- Content: 22 Characters
| Field Name | Character Length | Definition & Comments | Data Values | Barcode C Example Values |
Barcode L Example Values |
| Format | 1 | Identifies the format of the item. Used in place of Information Type ID for Barcode C and L. |
0 – Null or Test 1 – Letter 2 – Large Letter |
1 | 1 |
| Version ID | 1 | Identifies the barcode version | 1 – Mailmark Barcode | 1 | 1 |
| Class | 1 | Identifies the class of the item | 0 – Null or Test 1 – 1C for Retail 2 – 2C for Retail 3 – 3C for Retail 4 – Premium for Publishing Mail for Retail 5 – Deferred for Retail 6 – Air for Retail 7 – Surface for Retail 8 – Premium for Wholesale 9 – Standard for Wholesale |
2 | 2 |
| Supply Chain ID | 2 or 6 | Identifies the unique chain of customers involved in the mailing. Consolidator Supply Chain ID are 2 digits. All other 4-State SCIDs are 6 digits. |
00 to 99 000000 to 999999 |
12 | 123456 |
| Item ID | 8 | Identifies the unique item within the Supply Chain. |
00000000 to 99999999 | 12345678 | 12345678 |
| Destination Post Card plus DPS | 9 | Contains the Postcode of the destination with DPS | The Postal Code and Delivery Point must comply with Postcode Address File Format. | CW14LZ1F<space> | CW14LZ1F<space> |
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