With a massive list of telephone numbers in North America... the number of groupings is limitless So, if you have been searching for a certain phone number with a 850-584 area code exchange, you are now able to. With the help of reverselookupphonedirectory.com, all you must do to find information on someone with a 850-584 is insert the complete nine digit phone numberr into the given search field. That is all you need to get started on your search. The days of scouring for background information from multiple sources are gone.