The abbreviations and station numbers used for the 16 states of the Federal Republic of Germany are as follows: 


 CH = 10...19 = (Channel stations of no specified location)
 SH = 20...22 = Schleswig-Holstein
 HH = 23...27 = Hamburg
 MV = 28...29 = Mecklenburg-Vorpommern
 NS = 30...34 = Niedersachsen (Lower Saxony)
 HB = 35...36 = Bremen
 SA = 37...39 = Sachsen-Anhalt (Saxony-Anhalt)
 BE = 40...46 = Berlin
 BR = 47...49 = Brandenburg
 NW = 50...56 = Nordrhein-Westfalen (Northrhine-westphalia)
 RP = 57...59 = Rheinland-Pfalz (Rhineland-palatinate)
 HE = 60...66 = Hessen (Hessia)
 SL = 67...69 = Saarland
 TH = 70...72 = Thüringen (Thuringia)
 SN = 73...79 = Sachsen (Saxony)
 BW = 80...84 = Baden-Württemberg
 BY = 85...89 = Bayern (Bavaria)
 ZZ = 90...99 = (stations of unidentified location)
 IW = ....... = stations adminstrated by Germany in international waters  _OR_
                stations in german coastal waters


So a station number of 'D-3055' tells you, that the station is located in 'Niedersachsen' 
(Lower Saxony), and 'D-6038' is located in 'Hessen' (Hessia). Sometimes the numbers are 
different from the presumed location, these may be mistakes in my database, or the number 
refers to the administrative seat of a station. My aim would be to have the correct number 
for the state where the transmitter is located. 
So there will be some changes from time to time.

Station numbers are formed like this - where # means a number 0...9 : 

 D-#### (D-1000 ... D-9999) utility stations
 D-B### (D-B100 ... D-B999) broadcast stations
 D-BC## (D-BC10 ... D-BC99) broadcast stations
 D-BT## (D-BT10 ... D-BT99) television stations
 D-FM## (D-FM10 ... D-FM99) broadcast stations (FM only)
 D-F### (D-F100 ... D-F999) broadcast stations (FM only) 
 D-T### (D-T200 ... D-T899) transmitter sites (used by more than 1 station)

The first 2 numbers designate the state of origin.