With so many numbers nationwide... the number of groupings is unmeasurable So, if you have been trying to find a particular phone number beginning with a 808-640 area code exchange, you can. With the assistance of reverselookupphonedirectory.com, all you must do to find information on anyone with a 808-640 is enter their complete nine digit phone numberr into the provided search area. That is all you need to get started on your research. The days of scouring for background information from different sources are gone.