What is Code 128C Barcode?
Code 128C is a variant of Code 128 optimized for numeric data. It encodes pairs of digits (00-99) as single characters, providing double density compared to other Code 128 variants. This makes Code 128C the most space-efficient option for numeric-only data. It's ideal for encoding long numeric identifiers, tracking numbers, or any data consisting entirely of digits.
Why Use Code 128C Barcodes?
Double Density
Encodes 2 digits per character, providing the highest density for numeric data - twice as efficient as other variants.
Numeric Optimized
Perfect for numeric-only data like tracking numbers, order numbers, or numeric identifiers requiring maximum space efficiency.
Built-in Checksum
Includes mandatory checksum for error detection, ensuring high scanning accuracy even with compact barcodes.
Shipping Applications
Widely used in shipping and logistics for tracking numbers and numeric identifiers where space is limited.
How to Use Code 128C Barcodes
- Enter Numeric Data: Type numeric data (digits 0-9 only). Code 128C requires an even number of digits - add a leading zero if needed.
- Automatic Encoding: The system encodes pairs of digits as single characters, providing maximum density for numeric data.
- Customize Design: Adjust width scale, height, colors, and enable text display to match your labeling requirements.
- Test & Deploy: Preview and test with a Code 128-compatible scanner, then print or use digitally.
Frequently Asked Questions
Code 128C encodes digits in pairs (00-99 per character). If you have an odd number of digits, add a leading zero to make it even. For example, "12345" becomes "012345" for encoding.
Yes! Code 128C is twice as efficient for numeric data because it encodes 2 digits per character. For numeric-only data, Code 128C provides the smallest barcode size. Standard Code 128 automatically uses Code 128C for numeric sequences.
No, Code 128C only encodes numeric digits (0-9). For alphanumeric data, use Code 128A, 128B, or standard Code 128 which automatically selects the best variant.
Use Code 128C when you need to force C-variant encoding for pure numeric data. Standard Code 128 automatically uses Code 128C for numeric sequences, but explicit Code 128C gives you control. For most applications, standard Code 128 is recommended.
Yes! Code 128C is perfect for numeric tracking numbers, order numbers, or any numeric identifiers. Its double density makes it ideal for long numeric sequences where space is limited.
Code 128C has no fixed maximum length, but practical limits depend on scanner capabilities and print space. For best results, keep barcodes under 40 digit pairs (80 digits). Very long barcodes may be difficult to scan.
Code 128C offers similar or better density than Interleaved 2 of 5 for numeric data, plus it includes a checksum and is more widely supported by modern scanners. Code 128C is generally preferred for numeric data.
Yes! Code 128C is commonly used in GS1-128 shipping labels for numeric data segments. Standard Code 128 automatically uses Code 128C for numeric sequences within shipping labels.
Yes, Code 128C includes a mandatory checksum digit that's automatically calculated and added. This ensures data integrity and helps prevent scanning errors.
Yes! If you're logged in, you can edit saved Code 128C barcodes and update the encoded data, colors, size, or other settings. The barcode will be regenerated with the new information.
