Origin of airport country prefixes
I'm wondering who an me when these were defined by what rules:
K: US (why "K"?)
EG: UK ("G"reat Britain?)
ED: Germany ("D"eutschland?)
LF: France
LS: Switzerland
BTW, why do UK/Germany start with "E", but France/Switzerland with "L"?
A related question is about country prefixes in airplane identifiers. Were these defined by ICAO?
Thanks,
Michael