North American area codes Datenbank one month subscription service. Complete telecommunications Datenbank 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 Datenbank is NPA (area code), NXX (exchange), country, state, county, latitude, longitude, LATA, timezone, day light saving, population, FIPS, MSA, PMSA, CBSA and ZIP code.