For german airports, the german wikipedia site is not bad:
In Germany, ED has been used for civilian and ET for military airfields since reunification. Before that, ED was used for all airfields in the Federal Republic of Germany and ET for all airfields in the German Democratic Republic.
If there is a D in the third place for civil seats, it is an international commercial airport. Example:
EDDF - Frankfurt,
EDDH - Hamburg,
EDDN - Nuremberg,
EDDM - Munich.
Until the flight advisory service
AIS was centralized, the third letter stood for the
AIS of the international airport, in whose area of responsibility the place was. Example:
EDFM - Mannheim (area of responsibility: Frankfurt), or
EDHK - Kiel (area of responsibility: Hamburg).
After the turn, the letter combinations ED and then the third letters A, B, C, E, O and U were assigned to around 100 places in the new federal states.
If the letters in a large area are not sufficient, other letters without special reference are selected here too, e.g. B. in Northern Bavaria P and Q.
Example: The traffic and special landing areas in the western part of Northern Bavaria still belong to the Frankfurt area =
EDF. In eastern northern Bavaria (east of Würzburg and north of Nuremberg) the places have the identifier EDQA -
EDQZ (only J, Q, U and V are not assigned as the fourth letter). South of Nuremberg then
EDN (for Nuremberg) or EDP and further south from about Straubing then into the area
EDM (for Munich).
The fourth letter corresponds - if still available - to the first letter of the place (e.g. EDQG for Giebelstadt or
EDQZ for (Pegnitz) -Zipser Berg).
For military airfields, the third letter indicates which sub-armed forces use the space, see examples, including closed facilities:
A for U.S. Air Force
ETAR - Ramstein,
ETAD - Spangdahlem
E, I, O for US Army
ETEK - Baumholder,
ETOR - Coleman
AAF (Mannheim),
ETIC - Grafenwöhr
AAF,
ETIE - Heidelberg,
ETIH - Hohenfels
AAF,
ETOI - Vilseck
AAF,
ETOU - Wiesbaden
H for Army Aviation
ETHA - Altenstadt,
ETHH - Bonn-Hardthöhe,
ETHB - Bückeburg,
ETHC - Celle,
ETHS - Faßberg,
ETHF - Fritzlar,
ETHL - Laupheim,
ETHN - Niederstetten,
ETHE - Rheine,
ETHR - Roth
M for Marine
ETME - Eggebek,
ETMN - Nordholz,
ETMK - Kiel
N for air force
Northern Germany
ETNG - Geilenkirchen,
ETNH - Hohn,
ETNJ - Jever,
ETNK - Cologne,
ETNL - Rostock-Laage,
ETNN - Nörvenich,
ETNP - Hopsten,
ETNS - Schleswig / Jagel,
ETNT - Wittmund,
ETNU - Neubrandenburg,
ETNW - Wunstorf
S for air force
Southern Germany
ETSB - Büchel,
ETSE - Erding,
ETSH - Holzdorf,
ETSN - Neuburg,
ETSA - Landsberg,
ETSL - Lechfeld,
ETSI - Ingolstadt-Manching
U for UK
RAF / British Army
EDUO /
ETUO - Gütersloh, EDUL / ETUL - Laarbruch, EDUR /
ETUR - Brüggen,
EDUW - Wildenrath
W for defense technology Department
ETWM - Meppen