Do you need the model number? I was just in the setup menu today, and when I selected my cable box manufacturer (Pioneer), it allowed me to try the 6 or 7 codes they had to see which one turned my box on.
However, if you have AT&T Digital Cable (which a lot of people in Indiana seem to have), then you probably have a DCT-1000. Other possibilities include the CFT-2200 (analog box with yellow channel display - channel number and name appears on screen when you change channels, commonly used by Cablevision and Time Warner in fiber-optic upgraded neighborhoods) or the 5507 (crappy little box with green channel display and only 3 buttons on front, Channel + - and Power -- automatically resets to Channel 03 every time you turn it on/off). There's another very popular GI box, often used by Cablevision and Time Warner for customers without fiber-optic upgrades. I can't recall the model number off-hand, but it has a red channel display with dozens of little buttons on the TOP.
Hope this helps.