The announcement by iHeart and Grupo Acir was made today, although the full launch might be tied in with this weekend’s Fiesta Latina; the new Mexican platform includes both Acir’s stations and iHeart’s. Also, this appears to be a major expansion of a deal from 2014, whereby Acir’s stations were carried on the platform within the U.S.
Since the launch, I’ve been occasionally playing one or two of the online-only stations. However, I really didn’t have an opportunity to go deeper until today. It looks like the Mexican outlets involve: terrestrial stations; likely online-only extensions of the primary national brands (Amor, Mix, Radio Felicidad, and La Comadre); separate online-only formats (i.e., not involving a brand extension); and largely U.S.-based formats from iHeart. (Podcasts are also mentioned, but aren’t listed alongside the stations.)
The listings can be quite cluttered, so perhaps the best place to start is either from the homepage (at https://iheartradio.mx), where most of the non-brand-extension online-only stations are directly mentioned (under “Radio OnLine”), or from the filtered listings for Mexico City (at https://www.iheart.com/live/country/MX/city/ciudaddemexico-cmx-766), which includes most (or maybe even all) of the non-terrestrial offerings, plus only the local (CDMX-area) terrestrial stations. I haven’t had any issues so far playing the streams within the U.S.
An important clarification to the above: It looks like at least one other station owner (Grupo Radio Centro) has its outlets included on the platform; indeed, GRC has also had ties with iHeart dating back to 2014 (even though the Mexican platform itself apparently only involves Acir and iHeart). In the aforementioned listings for Mexico City, GRC’s outlets appear toward the end/bottom, but above most of the iHeart-only offerings (with Acir’s at the overall top). Not too surprisingly, GRC’s other largest markets should be Guadalajara and Monterrey.