Callsign blocks:- OK-OL. ISO 3166 code:- CZE.EU Timezone:- (daylight savings time applies) Amateur Allocations are as follows:- OK1 = Bohemia OL2 = Bohemia OL3 = Bohemia OL4 = Bohemia OL5 = Bohemia OK2 = Moravia OL6 = Moravia OL7 = Moravia OK4 = Special OK5 = Special OK6 = Special OK7 = Special OK8 = Foreigner OK0 = Repeater OL = Novice