Sony codes are pretty universal for quite some years now. I did a couple sony receivers recently that didn't have on and off codes in the database under their respective model numbers. I did find them under another receiver, a higher end model number. Nice thing about URC remotes is if you have the remote connected to the usb cable and the software running you can test codes without ever updating the remote.

The 3 digit codes you are refering to are specific to the manufacturer of a remote. They are not an industry standard. There for 001 may be a sony tv with UEI but it may be something else with another remote. You can't be pissed at URC for not doing something that would be very unreasonable for them to do given they have a good set of codes as it is and an easy way to add codes.