664 kHz — 0.664 MHz

Name: FreqBuddy radio frequency database
License: https://freqbuddy.com/

MF / medium wave. 1 station listed.

Stations listed on 664 kHz
Station	Country	Location	Power (kW)	Schedule (UTC)	Language
MW Station RU15	Russia	Regional Russia	673.100	0600-2400	Local