With so many telephone numbers nationwide... the number of groupings is unmeasurable So, if you have been searching for a specific telephone number that starts with a 408-607 area code exchange, you are now able to. With the help of reverselookupphonedirectory.com, all you must do to find information on a person with a 408-607 is type in their full nine digit telephone numberr into the given search box. that's all you need to begin your search. The days of trying to find background information from several sources are over.