640 AM

640 AM - The following radio stations broadcast on AM frequency 640 kHz: 640 AM is a North American clear-channel frequency. KFI in Los Angeles, California, KYUK in Bethel, Alaska, and CBN in St. John's, Newfoundland and Labrador, share Class A status of 640 AM.

In Argentina

 * LRA24 in Río Grande, Tierra del Fuego
 * LU18 in General Roca, Río Negro
 * LV15 in Villa Mercedes, San Luis

In Bolivia

 * CP 157 in Milluni

In Brazil

 * ZYH458 in Itabuna
 * ZYH-757 in Goiânia
 * ZYI-240 in Vitória·
 * ZYI-418 in Alta Floresta
 * ZYJ262 in Londrina
 * ZYJ-489 in Resende
 * ZYJ590 in Natal, Rio Grande do Norte
 * ZYK-277 in Porto Alegre
 * ZYK-547 in Araraquara
 * ZYL-308 in Para de Minas

In Canada
Stations in bold are clear-channel stations.

In Chile

 * CA-064 in Curico
 * CD-064 in Temuco

In Costa Rica

 * TIQQ in San José

In Colombia

 * HJBJ in Santa Marta
 * HJR32 in Bucaramanga

In Cuba

 * CMLA in Victoria de Las Tunas

In Ecuador

 * HCXY1 in Quito

In Guadeloupe

 * FFQ in Point-à-Pitre

In Guatemala

 * TGW in Guatemala City

In Honduras

 * HRNN4 in Tegucigalpa

In Mexico

 * XEJUA-AM in Cd. Juárez, Chihuahua
 * XENQ-AM in Tulancingo, Hidalgo
 * XETAM-AM in Santa Elena, Tamaulipas

In Panama

 * HOK 22 in Colón

In Paraguay

 * ZP 19 in Coronel Oviedo

In Peru

 * OAZ4K in Lima

In the United States
Stations in bold are clear-channel stations.

Between 1951 and 1963, the frequency was also one of two used for the United States' CONELRAD emergency broadcasting system, the other frequency being 1240 AM.

In Venezuela

 * YVSI in Maracaibo
 * YVQO in Puerto La Cruz