North American area codes Base de datos one month subscription service. Complete telecommunications Base de datos 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 Base de datos is NPA (area code), NXX (exchange), country, state, county, latitude, longitude, LATA, timezone, day light saving, population, FIPS, MSA, PMSA, CBSA, ZIP code, Operating Company Number, use type, rate center, COMMON Idioma identifier and V and H.