# HID 36bit Siemens

Everything you need to understand HID 36bit Siemens

## 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 (odd and even), allowing for easy management and avoiding card number duplication for secure, contactless access.

## HID 36bit Siemens 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.

### Odd parity

Odd Parity for Odd parity over bits 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35.

### Even parity

Even Parity for Even parity over bits 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34.

### 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 |

## The API that turns phones into key fobs.