# pivClass 75bit

Everything you need to understand pivClass 75bit

## Card format Overview

A proprietary 75-bit card format used in access control systems, featuring a unique structure composed of 14-bit site code, 20-bit card number, 14-bit agency code, and 25-bit expiration date, and 2 parity bits (even and odd), allowing for easy management and avoiding card number duplication for secure, contactless access.

## pivClass 75bit format properties

### Site Code

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

### Card Number

20 bits. A unique serial number (0-1,048,575) for each card within that facility code.

### Agency Code

14 bits (Bits 2-15), range 0-16,383.

### Expiration Date

25 bits (Bits 50-74), range 0-33,554,431.

### Even parity

Even Parity for Even parity over bits 1-37.

### Odd parity

Odd Parity for Odd parity over bits 38-74.

### 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 | 640190001900000C9<br>Copy |
| Decimal | 115299187341813350601<br>Copy |
| Binary | 000000001100100000000011001000000000000000110010000000000000000000011001001<br>Copy |