# 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.

### Generate examples

Put in the values for this card format, we'll generate the results in a few different formats.

### Here's your example

| Format  | Value                                                 |
| ------- | ----------------------------------------------------- |
| Hex     | 64<br>Copy                                           |
| Decimal | 100<br>Copy                                          |
| Binary  | 00000000000000000000000000000000000000000000000001100100<br>Copy |

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