CODE128B covers the full printable ASCII character set, making it the most common sub-type for general-purpose text barcodes. Uppercase and lowercase letters, digits, space, and punctuation are all supported.
Character set
Characters with ASCII codes 32–127: all printable characters including both letter cases and symbols. Non-printable control characters (codes 0–31) are outside its range; use CODE128A for those.
Common applications
Product labels, asset tags, document tracking, and any barcode workflow that encodes mixed-case alphanumeric text. CODE128 Auto often selects this sub-type automatically; use B directly when the spec requires it.