Excuse me, what I meant was gate B 73. different concourse, but the same issue of there being no Gate 73 in the B concourse. Parking positions is definitely a possibility.
some examples of flights flying into these positions:
Air France Flight 2407, January 26
Air Berlin Flight 8812, January 26
also, in concourse A, wikipedia says "Terminal A was opened in 1977 and has 16 gates (A01-A16)"
http://en.wikipedia.org/wiki/D%C3%BC...tional_Airport
but ifly says gates A70-A89
http://www.ifly.com/dusseldorf-DUS-a...DUS-Terminal-A
can anyone clear these mysteries up?