# 32-B

Everything you need to understand 32-B

## Card format Overview

A proprietary 32-bit card format used in access control systems,
featuring a unique structure composed of
14-bit facility code and 16-bit card number, and 2 parity bits (even and odd),
allowing for easy management and avoiding card number duplication for secure, contactless access.

## 32-B format properties

### Facility Code

14 bits. The facility code range is 0 to 16,383.

### Card Number

16 bits. A unique serial number (0-65,535) for each card within that facility code.

### Even parity

Even Parity for Even parity over bits 1-16.

### Odd parity

Odd Parity for Odd parity over bits 15-30.

### 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 | 80C800C8<br>Copy |
| Decimal | 2160591048<br>Copy |
| Binary | 10000000110010000000000011001000<br>Copy |

## The API that turns phones into key fobs.