The following radio stations broadcast on AM frequency 680 kHz: 680 AM is a North American clear-channel frequency. KNBR and KBRW share Class A status on 680 kHz. WRKO, WPTF, CJOB, and CFTR also broadcast on 680 kHz, with 50,000 watts at all times, but are class B.
Stations in bold are clear-channel stations.