This embodiment of the invention relates to a navigational system having at least navigational software capable of determining and or displaying maps, directions, and or for providing other location specific information. The navigational system is capable of accepting location identifier data. Such location identifier data can include a phone number, caller ID, an email address, an instant message address, and or other types and or kinds of location identifier data. In response, the navigational system performs a reverse lookup query using the location identifier data to determine the location street address, and or other location specific information. This location street address, and or other location specific information are then used to provide maps, directions, and other location information to a user by way of the navigational system. The navigational system can obtain information from local data processing resources, and or optionally from remote global network based data processing resources.