6. CogniCall global calling card 7.8¢ US (48 states), postpaid via credit card. Six-second billing. International calling card for US and overseas. Originate calls from 60+ international countries - not a callback.
Post-Paid calling card: once your usage reaches $25, your credit card will be billed.
Lowest calling rate to China 17.8¢ Beijing 13.3¢ Shanghai 13.3¢ Spain 10.3¢ Madrid 7.3¢ Taiwan 11.9¢
South Africa 26.9 Nigeria 50.9¢ Greece 18.9¢