With so many phone numbers nationwide... the possible number of groupings is limitless So, if you've been trying to find a certain phone number that starts with a 256-540 area code exchange, you can. Thanks to reverselookupphonedirectory.com, all you are required to do to find information on a person with a 256-540 is type in their complete nine digit phone numberr into the given search area. That is all you need to start your query. The days of scouring for background information from different sources are done.