630-meter band
AMATEUR RADIO FREQUENCY BAND
600-meter band; 630-meter amateur radio band; 600-meter amateur band; 600-meter band (amateur radio); 630m band; 600-meter amateur radio band
The 630-meter (or 600-meter) amateur radio band is a frequency band allocated by the International Telecommunication Union (ITU) to amateur radio operators, and it ranges from 472–479 kHz, or equivalently 625.9–635.