HID 37bit FAC Code & CN - (H10304)

Everything you need to understand HID 37bit FAC Code & CN - (H10304)

Card format Overview

A proprietary 48-bit card format used in access control systems, featuring a unique structure composed of 16-bit site code and 19-bit card number, and 2 parity bits (even and odd), allowing for easy management and avoiding card number duplication for secure, contactless access.

HID 37bit FAC Code & CN - (H10304) format properties

Site Code

16 bits. The facility code range is 0 to 65,535.

Card Number

19 bits. A unique serial number (0-524,287) for each card within that facility code.

Even parity

Even Parity for Even parity over bits 12-28.

Odd parity

Odd Parity for Odd parity over bits 29-47.

Generate examples

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

Here's your example

The API that turns phones into key fobs.