For 26 bit cards, it can be from 0 to 65,535. Here is a great keycard programming guideĮvery card has a consecutive serial number programmed, assigned in your access control software to a card holder. THey also provide an HID prox card programming checklist. Identisource has a good format and facility (site) code explanation and ID card group provides a great cheat sheet for HID proximity credential cards and the formats.
Binary data is often combined together into convenient four-bit hexadecimal, or hex units called Nybbles. Since computers always use binary math, each column can only contain a one (1) or zero (0). How card codes are calculated – math translations – decimal, binary and hexadecimal What are the different formats and why do we need to calculate them? “Facility Code” is “Company ID Code” in the case of 35 bit (HID Corporate 1000) cards. A note about card numbers: The Internal Card Number is usually the same as the External Card Number (the number printed on the card itself), however it can be offset to increase security (to hinder someone from interpreting the full card code).ģ. Based on the pattern of zero’s and one’s following each other, we can conclude if it is one of the following formats: Standard 26 Bit, Generic 34 Bit (Even or Odd Parity), HID Corporate 1000 (35 Bit), HID 37 Bit (with or without Facility Code), Casi-Rusco 40 Bit.Ģ. The card format is interpreted from the bit pattern.
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