With a wide range of numbers nationwide... the potential number of sequences is endless So, if you have been trying to find a particular telephone number that starts with a 217-644 area code exchange, you you now can. With the assistance of reverselookupphonedirectory.com, all you have to do to get information on a person with a 217-644 is type in the full nine digit telephone numberr into the given search area. That is all you need to begin your search. The days of looking for background information from different sources are gone.