1 and French barcode are all 13 digits starting from 300 ~ 379.
2.500 ~ 509 bar codes belong to British bar codes.
The interval between 3.400 and 440 is DeDuan.
4. Italian barcodes all start with 13 digits from 800 to 839.
The 13-digit bar code at the beginning of 5.840 ~ 849 belongs to Spain.
6. Swedish bar codes all start with 730 ~ 739.
7. All barcodes in Finland begin with 640 ~ 649.
8. Dutch bar codes are all numbers starting with 870 ~ 879.
The number 9.760 ~ 769 belongs to Switzerland.
10. All barcodes in Portugal are 13 digits starting with 560.
Bar code introduction
Bar code is a graphic identifier that arranges a number of black bars and blanks with different widths according to certain coding rules to represent a group of information. Common bar codes are parallel lines composed of black bars (referred to as bars) and white bars (referred to as spaces) with great differences in reflectivity.
Barcode can indicate the country of production, manufacturer, commodity name, production date, book classification number, starting and ending place, category and mailing date, and so on, so it has been widely used in many fields such as commodity circulation, book management, postal management, banking system and so on.
Above content reference: Baidu Encyclopedia-Barcode