Hecho general: 9903 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9903 is an unremarkable number.
Trivia: 9903 is an unremarkable number.
Fecha histórica: February 10th is the day in 1940 that the Soviet Union begins mass deportations of Polish citizens from occupied eastern Poland to Siberia.