# 36bit test

Everything you need to understand 36bit test

## Card format Overview

A proprietary 36-bit card format used in access control systems, featuring a unique structure composed of 18-bit site 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.

## 36bit test format properties

### Site Code

18 bits. The facility code range is 0 to 262,143.

### 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 1-17.

### Odd parity

Odd Parity for Odd parity over bits 18-35.

### Generate examples

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

### Site Code

### Card Number

Get examples

#### Here's your example

| Format | Value |
| --- | --- |
| Hex | 800C800C8<br>Copy |
| Decimal | 34372845768<br>Copy |
| Binary | 100000000000110010000000000011001000<br>Copy |