The concession for 1320 AM in Mexico City was originally awarded to Carmen Gutiérrez Trejo, with the callsign of XEAI.
Infored took over operation of the station in April 2000 and relaunched it in November of the same year, hoping to reach a young audience as "Track 13-20" with a rock format.
However, in June 2007, the legal fighting between Radio Centro and Monitor, which had severely hurt the latter's finances, forced the suspension of programming of both 1320 and 1560 AM from June 29 until September 3 (during that time, both stations only aired instrumental music and occasional news updates).
On May 23, 2008, STIRT, whose members were angry about unpaid wages,[4] raised its red and black flags at Radio Monitor, and both stations went off the air.
The station's last program was the noon edition of Monitor hosted by Héctor Jiménez Landín, who in the last minutes of the newscast read a statement announcing the strike and total suspension of programming, thanking the audience for almost 34 years of listening to Monitor.