Short description of North American Area Code Database (Basic Edition) July-Septe: North American area codes database one month subscription service. Complete telecommunications database targeted specifically toward disseminating all valid NPA/NXX combinations in the North American Numbering Plan. It covers all active North American NPA/NXX assignments including the United States and Canada. Included in this database is NPA (area code), NXX (exchange), country, state, county, population, FIPS code and ZIP code.