1060 AM is a United States and Mexican clear-channel frequency, on which KYW and XEEP-AM are the dominant Class A stations. WNPC must leave the air during nighttime hours to avoid interfering with the skywave signal of those Class A stations.
FM Translator
In addition to the main station at 1060 kHz, WNPC is relayed by FM translators; this gives the listener the choice of FM, and high fidelity sound. During nighttime hours, WNPC must leave the air; the FM translators allow WNPC to broadcast 24 hours a day. The FM frequency is shown in the Logo as the primary frequency in the station branding.