How are the bits allocated in a 26bit Wiegand card format?
Access control peripherals data format
Although this is an openly published data format, sometimes the actual data bit format is required.
The Wiegand 26 bit format consists of 24 bits of data and 2 Parity bits (Odd and Even)
The 24 data bits are split between 8 bits for the Site code and 16 bits for the card number.
Giving a card number range of 1 to 65535, and a site code range of 1 to 255.
A spreadsheet defining the format can be downloaded here.