Usable HF Frequencies for Amateur Radio

Color indicated (red, yellow, green, blue, white, etc.) determines the recommended HF frequencies for contacts from your nearest BASE. Cities shown cover the USA for DX applications. The New York and Seattle BASE images provide a general view of global DX from USA. Any white "bubble" indicates no suitable frequency or high absorption. This page refreshes every 30 minutes

Additional propagation data, as well as geomagnetic and solar information: