I have monitored Mexico Radio working various aircraft in Spanish. Most times Im able to hear both sides of transmissions from my location in Los Angeles.
Aah - I see why it didn't make much sense! It's an LDOC frequency, not MWARA or even RDARA. Just aircraft chatting back to their offices, not ATC at all.
I have alos monitoried many Aeromexico flight calling mexico radio on 13.339 USB. According to online info this is a LDOC for Aeromexico but I also hear San Fransisco Radio working various aircaft. Do they ever interfere with each other?????