I've got a miscall from this number's too. One time i catched the call but no one is talking on the other line. it is so annoying because this is not the first time i've a got a miscall with the same number. +239280595.
I got a call from +239280595 at 8:27 PM 2nd/feb/2010 , I got another missed call before but I forgot when it was and I think it was a week ago. I checked the country code +239 and it turns out to be in Africa and specifically São Tomé and Príncipe. They give you a missed call in order for you to call them back and they disconnect once you get through to empty your credit