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Just curious,
Has anyone been able to identify key types based on the numbers printed on the back of many key cards?
What exactly do they represent?
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It's never safe to assume printed numbers will relate to any information on the card.
In access control applications the number is sometimes an offset number between the externally printed number and the access control data stored on the card.
In other scenarios the number sometimes represents an order or client code.
Sometimes you can tell where the card came from and what the card is for based on the printing on the card.
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