7byte CSN 56bit

Everything you need to understand 7byte CSN 56bit

Card format Overview

A proprietary 56-bit card format used in access control systems, featuring a unique structure composed of 56-bit card number, allowing for easy management and avoiding card number duplication for secure, contactless access.

7byte CSN 56bit format properties

Card Number

56 bits. A unique serial number (0-72,057,594,037,927,935) for each card within that facility code.

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Format Value
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Decimal
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Binary
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The API that turns
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