The list below contains the country codes of the more popular European Countries (the country code is the first 2 letters of the IACO code).

EG= UNITED KINGDOM
EI= EIRE
BI= ICELAND
EN= NORWAY
ES= SWEDEN
EF= FINLAND
EK= DENMARK
EP= POLAND
ED= GERMANY
EH= NETHERLANDS
EB= BELGIUM
EL= LUXEMBOURG
LF= FRANCE
LE= SPAIN (ex. CANARY ISLANDS)
GC= CANARY ISLANDS
LP= PORTUGAL
LI= ITALY
LS= SWITZERLAND
LO= AUSTRIA
LK= CZECH REPUBLIC
LH= HUNGARY
LR= ROMANIA
LB= BULGARIA
LM= MALTA
LG= GREECE (ex. CYPRUS)
LC= CYPRUS
LT= TURKEY

UU= RUSSIA
C= CANADA
Y= AUSTRALIA
K= USA (Note that the rest of the 4 letter code is made up of the 3 letter IATA code, e.g N.Y (JFK)= KJFK, Miami= KMIA etc.)

Common City ICAO Codes

EHAM= AMSTERDAM
LGAT= ATHENS
LEBL= BARCELONA
EDDB= BERLIN
EBBR= BRUSSELS
LROP= BUCHAREST
LHBP= BUDAPEST
EKCH= COPENHAGEN
EDDF= FRANKFURT
LSGG= GENEVA
EFHK= HELSINKI
LTBA= ISTANBUL
LCLK= LARNACA
GCLP= LAS PALMAS
LPPT= LISBON
ELLX= LUXEMBOURG
LEMD= MADRID
LMML= MALTA
UUEE= MOSCOW
ENFB= OSLO
LEPA= PALMA (MALLORCA)
LFPG= PARIS (CDG)
LFPO= PARIS (ORLY)
LKPR= PRAGUE
BIRK= REYKJAVIK
LIRK= ROME
LBSF= SOFIA
ESSA= STOCKHOLM
GCTS= TENERIFE
LOWW= VIENNA
EPWA= WARSAW
LSZH= ZURICH