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Symbol Specifications

There are many barcode symbologies. Some common ones are the postal barcode used for mail routing, the Universal Product Codes used in the retail trades, MSI barcodes used in grocery stores, and the Code 3 of 9 symbology often used for data tracking and inventory. Bars & Stripes can produce standards compliant barcodes for 11 popular symbologies. Information for each barcode standard is presented here.

Summary of Valid Characters

This table shows the characters you are allowed to use for a particular symbology. If you try to use an invalid character for your barcode, Bars & Stripes will display the Change Setup Menu instead of producing an invalid barcode.

Symbology Valid characters
Codabar First and last character must be A, B, C, or D.
Other characters are 0 - 9 or '+', '-', '$', '/', ':', '.'
Code 128 full ASCII character set
Code 39 (3 of 9) A - Z, 0 - 9, space, '+', '.', '-', ' /', '$', '%'
Code 39 (full ASCII) full ASCII character set
Code 93 full ASCII character set
EAN 8 fixed length, 7 digits, 0 - 9
EAN 13 fixed length, 12 digits, 0 - 9
Interleaved 2 of 5 any length, digits, 0 - 9
MSI any length, digits, 0 - 9
Postal / Postnet fixed length, 5, 9, 11 digits, 0 - 9
UPC-A fixed length, 11 digits, 0 - 9
UPC-E fixed length, 6 digits, 0 - 9, last digit must be > 5

Learn more about UPC registration