There might also be an Acustik Chiapas in the not-too-distant future.

Grupo Acustik's new corporate website also lists their operated and affiliated stations (cities only), and some cities stand the heck out:

Coahuila: Piedras Negras, Saltillo and Torreón, matching the footprint of the Media FM stations on AM in Coahuila.

Chiapas: Playas de Catazajá, Tapachula and Comitán. Grupo Informativo Fusión Peninsular won stations at all three cities in IFT-4. As this is the first ever radio service in Playas, it's probably them.

Fusión Peninsular, whose name and investors suggest Quintana Roo origins (Chiapas is not on a peninsula), is owned by Javier Alexander González Slim, Jaime Eduardo Martínez González and Juan Leopoldo Ramos Hernández, according to information supplied by the IFT.

González Slim runs the Fundación Yantra, a fairly all-purpose charity. Martínez González is listed as the president of a resort HOA in Cancún. There is no information on the third principal.

Guerrero: No IFT-4 station was won in Ixtapa-Zihuatanejo, but that town is on the affiliate list.