International Phone CardsHow do Online Phone Cards Work

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This is often not the case in the United States where rates to call within a state regulated by that state’s public utilities commission are often higher than rates to call across the country or international (generally determined by competition). In some US locations where area codes cover more territory, different rates will apply within a single area code depending on the distance to the number called. Rates are determined from rate centers, and rates are set in zones of zero to six miles, six to 12 miles, and so on.