Fatto generale: 23308 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 23308 is an uninteresting number.
Trivia: 23308 is an uninteresting number.
Data storica: October 24th is the day in 1861 that the First Transcontinental Telegraph line across the United States is completed, spelling the end for the 18-month-old Pony Express.