As of 2015, the Mitsubishi universal TV remote codes, usable to activate a universal remote for use with a Mitsubishi TV were 0150, 0019, 0093 and 0178. These codes are specific to Mitsubishi TVs, and all other brands have their own unique codes.
There are innumerable universal remote codes. Companies like Admiral and Midland command their own suites of codes, differentiating themselves from other lines and preventing universal remotes from becoming programmed to several different sets of different brands.
All codes are four digits long and are unique to their brands with few exceptions. Some older brands like A-Mark and Zonda share codes and can be cross-programmed.