With a massive list of numbers in North America... the possible number of sequences is endless So, if you have been looking for a specific telephone number that starts with a 256-639 area code exchange, you can. Thanks to reverselookupphonedirectory.com, all you are required to do to find information on someone with a 256-639 is enter the full nine digit telephone numberr into the provided search field. that's all you need to start your search. The days of looking for background information from multiple sources are gone.