Where to view the K code(K28.5) for Aurora64B66B?

Hi zqsteve, could you give us more details about what you are requesting? The protocol spec documentation is below, and page 40 shows a table relating to block codes, is this what you are looking for?
https://www.xilinx.com/support/documentation/ip_documentation/aurora_64b66b_protocol_spec_sp011.pdf