I got some info here, wonder if its out of date for you guys:

Game Code Can be played on (Machine)

UC NTSC/UC
K NTSC/UC , NTSC/J
L NTSC/UC , PAL
W NTSC/UC , NTSC/J , PAL
J NTSC/J
PAL PAL

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Machine Code Region

UC United States / Canada
J Asia
PAL Europe / Australia / New Zealand / Middle East