XEX-FM

Mexico City Mexico
Broadcast area	Greater Mexico City
Frequency	101.7 FM
Branding	Los 40
Programming
Format	Contemporary hit radio
Ownership
Owner	Radiópolis (Cadena Radiodifusora Mexicana, S.A. de C.V.)
Sister stations	XEX-AM, XEQ-AM, XEQ-FM, XEW-AM, XEW-FM
History
First air date	October 1, 1975; 49 years ago (1975-10-01)
Technical information
Class	C1
ERP	51,190 watts[1]
HAAT	172 m (564 ft)
Transmitter coordinates	19°23′40″N 99°10′26″W / 19.39444°N 99.17389°W / 19.39444; -99.17389
Links
Webcast	Listen live
Website	los40.com.mx

XEX-FM (101.7 MHz) is a commercial radio station in Mexico City. Broadcasting from a tower atop the World Trade Center Mexico City, XEX-FM airs a contemporary hit radio format from the "Los 40" network. Most songs in the playlist are hits in English.

XEX-FM is a Class C1 station. It has an effective radiated power (ERP) of 51,190 watts.^[2]

XEX-FM signed on the air on October 1, 1975; 49 years ago (October 1, 1975). It became the third FM station in the Radiópolis/Televisa Radio system. It carried a pop music sound as "Stereo 102", but most of its history has been marked by frequent format changes. In the early 1980s it was "Radio Romántica", then "Estelar FM" (both with romantic music). That was followed in 1988 by a return to pop music in English and Spanish as "Estéreo 102".

It later was "Yo 102", a contemporary hits format giving the station some ratings success. In 1994, it experimented with the name "Kiss FM", which failed to catch on. In 1996, after the brief return of Stereo 102, XEX-FM became "Vox FM".

In 2002, Televisa Radio and Spain's PRISA began a partnership. The two companies launched the "Los 40 Principales" brand in Mexico, which was popular in Spain and other Latin American countries. Televisa Radio and Grupo Radiorama signed an agreement, allowing the much larger Radiorama to syndicate the Los 40 Principales format to its stations for wider coverage across Mexico.