1906-1919
Austria-Hungarian Empire
0=Bohemia Province

1919-1930
B=Niederosterreich
Roman numerals for the thousands and the up to 3 digits is the serial

1939-1945
German type plates were introduced during the German Occupation of Austria / Nd = Niederdonau / Red V means War Driving Permit.

1939-1945
German occupation WWII / W = Vienna
Official red stamp still vaguely possible

1946
Soviet Zone / Niederosterreich

1947-1989 / Issued in 1969
Temporary / S = Salzburg

1991 (Series from 1991)
Temporary / Tirol

From 1989
Dealer

1947-1989
Manufacturers and Garage plate

1990-1992
Manufacturers and Garage plates
Early series without validity stickers
W = Wien (Vienna)

1990-current
Steiermark / Manufacturers and Garage plate / G = Graz

1990-current
Validation sticker 1993
Manufacturers and Garage plate

2001
Salzburg / Manufacturers and Garage plate / S = Salzburg

1947-1989
Trailer / W = Vienna

1947-1989
Trailer / T = Tirol

1990-2001
mc

W=Wien/Vienna D=Diplomatic 4=German Embassy

From 2002
Diplomatic
W = Vienna / D = Diplomatic / 4 = German Embassy

From 2002
PT = Postal Services (PT used to be for Postal and Telecom, but since 2001 only for Postal Services, as the Telecom part of the organization became a private company then)

Vehicle speed sign

Vehicle speed sign

Vehicle speed sign

From 1990
Used on non-Austrian trailers behind Austrian prime movers

1960's-1970's
Boat plate