680 AM
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.
In Argentina
- LT3 in Rosario, Santa Fe
- LU12 in Rio Gallegos, Santa Cruz
- LV6 in Mendoza
In Canada
In Mexico
- in Chilpancingo, Guerrero
- XEFCSM-AM in Mérida, Yucatán
In the United States
| Call sign | City of license | Day kW | Night kW | Transmitter coordinates |
| KBRD | Lacey, Washington | 0.25 | 0 | |
| KBRW | Barrow, Alaska | 10 | 10 | |
| KFEQ | Saint Joseph, Missouri | 5 | 5 | |
| East Helena, Montana | 5 | 0 | ||
| KKYX | San Antonio, Texas | 50 | 10 | |
| KNBR | San Francisco, California | 50 | 50 | |
| KOMW | Omak, Washington | 5 | 0 | |
| Clovis, New Mexico | 0.5 | 0.5 | ||
| WAPA | San Juan, Puerto Rico | 10 | 9.5 | |
| WCBM | Baltimore, Maryland | 50 | 20 | |
| WCNN | North Atlanta, Georgia | 50 | 10 | |
| WCTT | Corbin, Kentucky | 0.77 | 0.83 | |
| WDBC | Escanaba, Michigan | 10 | 1 | |
| WGES | Saint Petersburg, Florida | 0.69 | 0.125 | |
| WHBE | Newburg, Kentucky | 1 | 0.45 | |
| Binghamton, New York | 5 | 0.5 | ||
| Butler, Pennsylvania | 0.25 | 0.05 | ||
| WKAZ | Charleston, West Virginia | 10 | 0.221 | |
| WMFS | Memphis, Tennessee | 8 | 5 | |
| Hallie, Wisconsin | 2.5 | 0.5 | ||
| Raleigh, North Carolina | 50 | 50 | ||
| Boston, Massachusetts | 50 | 50 |