With a wide range of numbers nationwide... the potential number of groupings is endless So, if you've been searching for a specific phone number that starts with a 520-642 area code exchange, you are now able to. With the assistance of reverselookupphonedirectory.com, all you are required to do to find information on a person with a 520-642 is enter the complete nine digit phone numberr into the available search area. That is all you need to start your research. The days of looking for background information from different sources are done.