Our packages of 10, 100 and 1000 barcodes include a globally unique company prefix.   10 packages include an 11 digit company prefix with 0 - 9 product allocation range. 100 packages include a 10 digit company prefix with 00 - 99 product allocation range. 1000 packages include a 9 digit company prefix with 000 - 999 product allocation range. All other package quantities do not support this feature but every barcode we supply is globally unique.