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February 4, 2025

Examples of every access control bit format

Access Control Protocols
Auston Bunsen
Overview
In smart card and access control systems, bit formats define how data is structured, transmitted, and interpreted. Whether you’re working with Wiegand, MIFARE, HID, or other proprietary formats, understanding these encoding methods is crucial for ensuring compatibility and seamless integration with readers and controllers.

This guide explores 60 different bit formats, breaking down their structure, usage, and decoding methods. For each format, we will provide:

  • Example encoded data to illustrate how information is stored.
  • A decoding table that translated raw bitstreams into meaningful values.

By the end of this guide, you’ll have a clear understanding of various bit formats used in smart cards and access control, enabling you to analyze, troubleshoot, and work with different card technologies effectively. Let’s dive in and decode the details!
Casi F/2F 12 Digit Magstripe
Composed of 12-bit card number.

 Example bits: 000001000101

 
Card number
69
 
Midas
Composed of 6-bit site code, 4-bit card number.

 Example bits: 0101010100000

 
Site code Card number
42 69
 
Tecom swipe
Composed of 6-bit site code, 6-bit card number.

 Example bits: 010101010001000

 
Site code Card number
42 69
 
Standard 26bit - (H10301)
Composed of 8-bit facility code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 10010101000000000010001010

 
Facility code Card number Even parity Odd parity
42 69 valid valid
 
Indala 26bit
Composed of 12-bit site code, 12-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 10000001010100000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Indala 27bit
Composed of 13-bit site code, 14-bit card number.

 Example bits: 000000010101000000001000101

 
Site code Card number
42 69
 
Indala ASC 27bit
Composed of -bit site code, 14-bit card number.

 Example bits: 000000010001100100001010000

 
Site code Card number
42 69
 
Tecom
Composed of -bit site code, 16-bit card number.

 Example bits: 001010000110000001001000000

 
Site code Card number
42 69
 
2804 Wiegand
Composed of 8-bit facility code, 15-bit card number, 1 even parity bit, 2 odd parity bits.

 Example bits: 1010000101010000000010001011

 
Facility code Card number Even parity Odd parity Odd parity
42 69 valid valid valid
 
Indala 29bit
Composed of 13-bit site code, 16-bit card number.

 Example bits: 00000001010100000000001000101

 
Site code Card number
42 69
 
ATS Wiegand 30bit
Composed of 12-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 100000010101000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID ADT 31bit
Composed of 4-bit site code, 23-bit card number.

 Example bits: 0101000000000000000001000101000

 
Site code Card number
42 69
 
ATS Wiegand 32bit
Composed of 13-bit site code, 17-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 10000000010101000000000001000101

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Indala/Kantech KSF
Composed of 8-bit site code, 16-bit card number.

 Example bits: 00000000010101000000000010001010

 
Site code Card number
42 69
 
K32
Composed of 8-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 10000000010101000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Wiegand 32bit
Composed of 12-bit site code, 16-bit card number.

 Example bits: 00000000001010100000000001000101

 
Site code Card number
42 69
 
HID 32bit Hewlett-Packard
Composed of 12-bit site code, 19-bit card number.

 Example bits: 00000001010100000000000001000101

 
Site code Card number
42 69
 
HID Check Point 32bit
Composed of 24-bit card number.

 Example bits: 00000000000000000010001010000000

 
Card number
69
 
4byte CSN 32bit
Composed of 32-bit card number.

 Example bits: 00000000000000000000000001000101

 
Card number
69
 
32-B
Composed of 18-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 100000000000010101000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Indala 33bit (DSX)
Composed of 7-bit site code, 24-bit card number.

 Example bits: 001010100000000000000000010001010

 
Site code Card number
42 69
 
HID 33bit - (D10202)
Composed of 7-bit site code, 24-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 101010100000000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
RS2-HID F/C 3 33bit - (R901592C)
Composed of 2-bit site code, 27-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 011000000000000000000000100010101

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID Standard 34bit - (H10306)
Composed of 16-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 1000000000010101000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Indala 34bit Optus
Composed of 11-bit site code, 16-bit card number.

 Example bits: 0000000000100010100000000001010100

 
Site code Card number
42 69
 
Cardkey Smartpass
Composed of 14-bit site code, 16-bit card number.

 Example bits: 00000000010101000000000000001000101

 
Site code Card number
42 69
 
HID 34bit - (N1002)
Composed of 8-bit site code, 16-bit card number.

 Example bits: 0000000000010101000000000010001010

 
Site code Card number
42 69
 
BQT 34bit
Composed of 8-bit site code, 24-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 1001010100000000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID 35bit Corporate 1000
Composed of 12-bit site code, 20-bit card number, 1 even parity bit, 2 odd parity bits.

 Example bits: 01000000101010000000000000010001010

 
Site code Card number Even parity Odd parity Odd parity
42 69 valid valid valid
 
HID 36bit Siemens
Composed of 18-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 000000000000010101000000000010001011

 
Site code Card number Odd parity Even parity
42 69 valid valid
 
Chubb 36bit
Composed of 14-bit site code, 16-bit card number.

 Example bits: 000000000101010000000000000010001010

 
Site code Card number
42 69
 
HID 36bit Inner Range
Composed of 12-bit site code, 16-bit card number.

 Example bits: 000000000010001010000000000101010000

 
Site code Card number
42 69
 
HID Simplex 36bit
Composed of 8-bit site code, 24-bit card number, 2 odd parity bits.

 Example bits: 000101010000000000000000000010001010

 
Site code Card number Odd parity Odd parity
42 69 valid valid
 
HID Clock & Data - (H10320)
Composed of 32-bit card number, 2 even parity bits, 1 odd parity bit.

 Example bits: 000000000000000000000000010001010101

 
Card number Even parity Odd parity Even parity
69 valid valid valid
 
36bit test
Composed of 18-bit site code, 16-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 100000000000010101000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID Farpointe 37bit with Site Code - (H10304)
Composed of 16-bit site code, 19-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 1000000000010101000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID 37 Bit (H10302)
Composed of 35-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 0000000000000000000000000000010001010

 
Card number Even parity Odd parity
69 valid valid
 
HID generic 37bit
Composed of 32-bit card number, 2 even parity bits, 1 odd parity bit.

 Example bits: 0011000000000000000000000000010001010

 
Card number Even parity Even parity Odd parity
69 valid valid valid
 
AWID RS2 34bit
Composed of 8-bit site code, 24-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 1001010100000000000000000010001010000

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
PointGaurd MDI 37bit
Composed of 4-bit site code, 29-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 0001010000000000000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
BQT 38bit
Composed of 13-bit site code, 1 even parity bit, 1 odd parity bit.

 Example bits: 10000000101010000000000000000000000001

 
Site code Even parity Odd parity
42 valid valid
 
ISCS 38bit
Composed of 10-bit site code, 22-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 10000000010101000000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Pyramid Wiegand Format
Composed of 17-bit site code, 20-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 100000000000101010000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID 40bit Honeywell - (P10001)
Composed of 12-bit site code, 16-bit card number.

 Example bits: 0000000000101010000000000100010100000000

 
Site code Card number
42 69
 
Casi-Rusco 40bit
Composed of 38-bit card number.

 Example bits: 0000000000000000000000000000000010001010

 
Card number
69
 
XceedID RS2 40bit
Composed of 10-bit site code, 28-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 1000010101000000000000000000000010001011

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Lenel
Composed of 14-bit site code, 12-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 000000001010100000010001010000000000000001

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HID 37bit FAC Code & CN - (H10304)
Composed of 16-bit site code, 19-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 000000000001000000000010101000000000000010001010

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
HUGHES ID 37bit - (H10302)
Composed of 35-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 000000000000000000000000000000000000000010001010

 
Card number Even parity Odd parity
69 valid valid
 
HID 48bit Corporate 1000 - (H2004064)
Composed of 23-bit card number, 1 even parity bit, 2 odd parity bits.

 Example bits: 000000000000000000000000000000000000000010001011

 
Card number Even parity Odd parity Odd parity
69 valid valid valid
 
Inner Range SIFER 56bit - (I941747A)
Composed of 24-bit site code, 32-bit card number.

 Example bits: 00000000000000000010101000000000000000000000000001000101

 
Site code Card number
42 69
 
7byte CSN 56bit
Composed of 56-bit card number.

 Example bits: 00000000000000000000000000000000000000000000000001000101

 
Card number
69
 
iCLASS truncated CSN 56bit
Composed of 56-bit card number.

 Example bits: 00000000000000000000000000000000000000000000000001000101

 
Card number
69
 
TWIC / CAC Wiegand 58 bit format
Composed of 14-bit agencyCode, 14-bit systemCode, 20-bit credentialCode, 4-bit credentialSeries, 4-bit individualSeriesIssue, 1 even parity bit, 1 odd parity bit.

 Example bits: 0000000000000000000000000000000000000000000000000000000001

 
Even parity Odd parity
valid valid
 
TWIC / CAC Wiegand 56-bit format(without parity) with Transaction Status Messages (total of 64 bits)
Composed of 14-bit agencyCode, 14-bit systemCode, 20-bit credentialCode, 4-bit credentialSeries, 4-bit individualSeriesIssue, 7-bit transactionStatusMessages.

 Example bits: 0000000000000000000000000000000000000000000000000000000000000000

 

| | || | |

 
8byte iCLASS CSN 64bit
Composed of 64-bit card number.

 Example bits: 0000000000000000000000000000000000000000000000000000000001000101

 
Card number
69
 
75bit PIV
Composed of 14-bit site code, 14-bit agencyCode, 25-bit expirationDate, 20-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 000000000100011000000001010100000000000000100010110011010100000010010111110

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
pivClass 75bit
Composed of 14-bit site code, 14-bit agencyCode, 25-bit expirationDate, 20-bit card number, 1 even parity bit, 1 odd parity bit.

 Example bits: 100000000000000000000001010100000000000000100010100000000000000000000000000

 
Site code Card number Even parity Odd parity
42 69 valid valid
 
Conclusion
This was a very long guide - but hopefully you've got a handy look up table for all of your bit / card formats. If you have any feedback, as usual, don't hesitate to email [email protected]
Keyscan C15001 36bit
Composed of 10-bit OEM code, 8-bit facility code, 16-bit card number, and 2 parity bits (even and odd).

 Example bits: 000000000010010101010100100010101010

 
OEM Site code Card number Even parity Odd parity
1 42 42069 valid valid
 
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