this 906-795-1768 been calling my 12 yr. old son's cellphone, for 3 different days and for all hours! my son tried to ignore the calls, and we never gave away our numbers to anyone we don't know. but since they never stop calling he answered (in my presence), but no one answered. called again after few hours and i told them not to call anymore! i'm creeped out that someone is calling my son's cellphone. we don't know how to block this number.