1. A method of inputting an address of a destination in a navigation system, comprising the following steps of: receiving a first character of an address of a destination specified by a user; reading a precompiled data file to search administrative regions that have the addresses that start with the first character specified by the user; displaying a list of names of the administrative regions that have the addresses that start with the first character specified by the user; receiving a name of the administrative region selected by the user from the list; displaying candidate addresses that start with the first character specified by the user within the selected administrative region; and selecting the address of the destination out of the candidate addresses.