KFZO logo 2021.png
CityDenton, Texas
Broadcast areaDallas-Fort Worth Metroplex
Frequency99.1 MHz (also on HD Radio)
BrandingZona MX 99.1
FormatRegional Mexican
OwnerUforia Audio Network
(Univision Radio San Francisco, Inc.)
Also part of the Univision Cluster: KUVN-TV and KSTR-TV
First air date
December 1988
Former call signs
KWDC (1987–1988)
KJZY (1988–1992)
KDZR (1992–1995)
KHCK (1995–2004)
KFZO (2004–2012)
KDXX (2012–2016)
Call sign meaning
K Fort Worth ZOne
Technical information
Facility ID7040
ERP100,000 watts
HAAT356 meters (1,168 ft)
WebcastListen live (via iHeartRadio)

KFZO (99.1 MHz "ZonaMX 99.1") is a commercial FM radio station licensed to Denton, Texas and serving the Dallas-Fort Worth Metroplex. The station airs a Regional Mexican radio format and is owned and operated by Univision Radio. The station's studios and offices are located in the Univision building in the Arts District of Dallas. . The station is an affiliate of the Dallas Cowboys Spanish Language Radio Network.[1]

KFZO has an effective radiated power (ERP) of 100,000 watts, the maximum for non-grandfathered FM stations. The transmitter is off County Road 2560 in Alvord in Wise County.[2]

KDXX is not licensed by the FCC to broadcast in the HD (digital hybrid) format.[3]


The station began signed on as KWDC on September 15, 1988. It played Jazz music and was owned by Denton FM Radio, Ltd. Less than a month after the station went on the air, owners Bill Mercer and Fred Graham sold it to Larry Greene, who bought it for $6 million.[4] Greene changed the call sign to KJZY ("Jazzy 99.1"). In 1991, KJZY made an unusual move for a commercial station, developing "Operation Jazzy" to help save the station's unique format by soliciting listener donations. Some $25,000 was raised, which was only a small portion of the needed $150,000. By December, the station went dark and was sold.

In December 1992, the station went back on the air as KDZR ("Z-Rock 99.1 FM"), playing heavy metal rock from ABC Radio Network's Z Rock satellite feed, which was based in Dallas. It was then purchased by Marcos A. Rodriguez on February 1, 1995. It flipped to KHCK ("99.1 Kick FM"), airing Tejano music. The station was also simulcast on 107.9 MHz.

In 2004, the station was then sold to Hispanic Broadcasting (later becoming Univision Radio). Less than a year later, the station changed names and formats to KFZO as a Cumbia music station. A short time later, Univision switched it to a Reggaeton format, calling the station "La Kalle" (Spanish for "The Street").

On February 19, 2009, the Regional Mexican format known as "La Que Buena" was moved from 107.9 FM (KESS-FM) to 99.1 and was simulcast on 107.1 FM (KFZO). The Reggaeton station known as "Radio La Kalle" was then moved to 107.9 FM and retooled its format to Latin Pop where it remained until late 2011.

In early 2011, its sister station KDXX (now KFZO) broke away from the "La Jefa" simulcast.

On June 28, 2012, KFZO changed its format to Spanish Adult Contemporary music, branded as "Máxima 99.1" and switching call letters to KDXX.[5]

On July 29, 2013, KDXX started simulcasting on KFZO 107.1.

In September 2014, the "Máxima" branding was changed to "Latino Mix 99.1 & 107.1" and retooled to a Latin Pop format.

On February 17, 2016, Univision swapped call signs and formats once again on 99.1 and 107.9, marking the return of the KFZO call letters to 99.1 FM. A day later, 99.1 returned to its current Regional Mexican format as "La Jefa."[6] The La Jefe branding only lasted a year before the station switched to "ZonaMX."


Unlike most of the area's FM stations like sister KLNO, which transmit their signals from Cedar Hill, KFZO transmits its signal from an unincorporated area East-Northeast of Alvord. Therefore, KFZO's signal is much stronger in the Northwestern parts of the Dallas/Fort Worth metroplex as well as the cities of Decatur, Bowie, Gainesville, and Sherman, but is considerably weaker in Dallas and areas Southeast of the city itself.


  1. ^ "Dallas Cowboys on Radio". DallasCowboys.com. Archived from the original on 2007-12-08. Retrieved 2016-02-17.
  2. ^ Radio-Locator.com/KFZO
  3. ^ FCC Internet Services Staff. "Station Search Details". Licensing.fcc.gov. Retrieved 2016-06-02.
  4. ^ Broadcasting & Cable Yearbook 1991 page B-318
  5. ^ "Univision Launches "Radio H2O" 107.9 Dallas". 28 June 2012. Retrieved 2 June 2016.
  6. ^ La Jefa On The Move In Dallas – RadioInsight (published February 17, 2016)

External links

  • "Máxima 99.1 & 107.1" Official Website
  • KFZO in the FCC FM station database
  • KFZO on Radio-Locator
  • KFZO in Nielsen Audio's FM station database
  • DFW Radio/TV History

Coordinates: 33°23′24″N 97°33′54″W / 33.390°N 97.565°W / 33.390; -97.565