Following World Radiocommunication Conference 2012 (WRC-2012), the amateur service received a new allocation between 472 and 479 kHz for narrow band modes and secondary service, after extensive propagation and compatibility studies made by the ARRL 600 meters Experiment Group and their partners around the world.
Mengikuti Konferensi Komunikasi Radio Dunia 2012 (WRC-2012), layanan radio amatir kini menerima alokasi baru antara 472 dan 479 kHz untuk penggunaan bermode pita sempit dan layanan sekunder, setelah studi propagasi dan kompatibilitas luas yang dibuat oleh Grup Eksperimen ARRL 600 meter, serta mitra mereka di seluruh dunia.