@Rentero - LiveATC has an ATC Audio Archive link where you can access past recordings, I was able to find where one of the pilots is checking in with MMMY Departure (callsign is November 345 Mike Charlie - N345MC) at about 19min and 34secs into the recording, he is at 3000 feet and requesting 37,000 feet (FL370), departure clears him to FL370 and then at about 23min and 49secs departure hands him over to the next ATC frequency 124.5 Mhz which is not covered on this feed so it is the last we hear from them. (To access recorded feed click ATC Audio Archive on left link menu on LiveATC homepage, choose UTC date Sunday Dec. 9th, 2012, MMMY (Monterrey) and 0900z-0930z GMT/UTC time)