There is no code. It's just replacement or sometimes abbreviated as RC.
96401
phone nintendo for a replacment code
33234
27447
92326
blizzard entertainmet
81.47
It will be in the suffix code stamped on the block. If it has a "CE" in the suffix code, regardless of displacement it's a replacement block. CE stands for "counter exchange."
396.2
23331 rt
996.4x