The following is a snapshot taken from http://www.ourfavouritecompanies.com/OffPeak/phone-rates/PhoneStar.shtml#rates at the time of writing
Where PhoneStar (callthrough) has the cheapest rate in our database
to the given country (at the time of writing), the rate is shown in red.
Click on the name of any country to see all off-peak rate
call rates in our database to that country