Mine is located in the 400's on directv when you have the spanish package. it is called AZA. There is also an AZM for Azteca Mexico, but I've never seen it having boxing. AZA has boxing at least twice a month, I'd guess. Sometimes they have title fights, but usually it's pretty weak.
I have Comcast cable....and in Channel 568 BOXING is schedule for 10PM-12AM.....BOX AZTECA so I'm guessing that is it...
Then in another channel....584 they have Jorge Linares vs. Sergio Thompson for some title...LIVE..from Cancun...so who konws...
Granted he was fighting an utter scrub, but Pavlik looked sharp and lean, if he could somehow make 160, I'd love to see him in a re against martinez http://www.youtube.com/watch?v=tkx0wSgrSbM