I'm not sure what you mean by "9UU.226.COD". This doesn't appear to be a standard code or format for anything I'm familiar with. It could potentially be:

1. A custom reference number or code

2. Part of a larger sequence or system

3. Possibly related to a specific field or industry

Without more context, it's difficult to provide a meaningful interpretation or explanation. If you have additional information about where this code comes from or what it might relate to, please share that and I'll do my best to help further.