With a massive list of numbers nationwide... the possible number of groupings is limitless So, if you've been looking for a specific number with a 203-527 area code exchange, you are now able to. Thanks to reverselookupphonedirectory.com, all you must do to get information on anyone with a 203-527 is enter the entire nine digit numberr into the provided search area. That is all you need to start your search. The days of scouring for background information from several sources are over.