# Casi-Rusco 40bit

Everything you need to understand Casi-Rusco 40bit

## Card format Overview

A proprietary 40-bit card format used in access control systems, featuring a unique structure composed of 38-bit card number, allowing for easy management and avoiding card number duplication for secure, contactless access.

## Casi-Rusco 40bit format properties

### Card Number

38 bits. A unique serial number (0-274,877,906,943) 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     | C8<br>Copy                                            |
| Decimal | 200<br>Copy                                          |
| Binary  | 0000000000000000000000000000000011001000<br>Copy |

## The API that turns phones into key fobs.