Is it possible to create an UPC-E barcode which begins with a digit other than 0?
No, according to GS1 specification UPC-E should always begin with a zero.
You can find more information about the rules in chapter 18.104.22.168.4 UPC-E barcodes in the GS1 General Specifications document available at: https://www.gs1.org/docs/barcodes/GS1_General_Specifications.pdf
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