From sign-on in 1940 to March 1941, KPHO occupied 1200 kHz and was carried the dramas, comedies, news and sports of the NBC Blue Network, which later became ABC. Prior to KPHO's sign-on, both NBC Red and NBC Blue network programs aired on 620 KTAR. On March 28, 1941, KPHO and all other stations on 1200 moved to 1230, when the North American Regional Broadcasting Agreement (NARBA) took effect. On September 21, 1949, KPHO moved to 910 kHz. 910 was later the home of KJJJ and KFYI, and is now KGME XTRA Sports 910.