PointGaurd MDI 37bit - Bit Format Details - AccessGrid
PointGaurd MDI 37bit
Everything you need to understand PointGaurd MDI 37bit
Card format Overview
A proprietary 37-bit card format used in access control systems, featuring a unique structure composed of 4-bit site code and 29-bit card number, and 2 parity bits (even and odd), allowing for easy management and avoiding card number duplication for secure, contactless access.
PointGaurd MDI 37bit format properties
Site Code
4 bits. The facility code range is 0 to 15.
Card Number
29 bits. A unique serial number (0-536,870,911) for each card within that facility code.
Even parity
Even Parity for Even parity over bits 1-18.
Odd parity
Odd Parity for Odd parity over bits 18-36.
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 | 3C00000C8 Copy |
| Decimal | 16106127560 Copy |
| Binary | 0001111000000000000000000000011001000 Copy |