Callsign blocks:- HF SN-SR 3Z. ISO 3166 code:- POL.EU Timezone:- (daylight savings time applies) Amateur Allocations are as follows:- HF0 = Antarctic bases ATA.AN) SP1 = Szczecin & Koszalin SP2 = Gdansk & Bydoszcz SP3 = Poznan & Zielona Gora SP4 = Bialystok & Olsztyn SP5 = Warsaw SP6 = Wroclaw & Opole SP7 = Lodz & Kielce SP8 = Lublin & Rzeszow SP9 = Katowice & Crakow SO = Foreigner Suffix K, P or Z = Club