It can mean "Code Name" as in the popular Korean Band CN BLUE
It means a patient has gone into cardiac arrest.
You mean TX-20? The code is PE7FGD
if you mean by coin code by getting stuff, you get a (blue) book and 1500 coins
Miami blue - paint code L51C
pearl vigor blue is code YKY.
Not sure if you mean the Serial Number, since those are usually always the codes for every card, which Blue-Eyes Ultimate Dragon's code/serial number is 23995346, if that's what you're asking.
Blue Eye, Missouri, is in area code 417.
The airport code for Blue River Airport is YCP.
The airport code for Blue Grass Airport is LEX.
Code Blue - 2010 is rated/received certificates of: USA:R
paint code: 0865 - Deep purplish blue metalic (DPBML)