HID Simplex 36bit

Everything you need to understand HID Simplex 36bit

Card format Overview

A proprietary 36-bit card format used in access control systems, featuring a unique structure composed of 8-bit site code and 24-bit card number, and 2 parity bits (odd), allowing for easy management and avoiding card number duplication for secure, contactless access.

HID Simplex 36bit format properties

Site Code

8 bits. The facility code range is 0 to 255.

Card Number

24 bits. A unique serial number (0-16,777,215) for each card within that facility code.

Odd parity

Odd Parity for Odd parity over bits 1-17.

Odd parity

Odd Parity for Odd parity over bits 17-35.

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

Site Code

Card Number

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The API that turns phones into key fobs.