This looks like a Sony Code. Are you sure it is for a Zenith?

If you have a code that does not work or need codes for a particular make/model of equipment, it is best to post what you need and somebody will likely come to the rescue.

If you are working on a research project, etc...

In the Classic Pronto Files Section, under User Documentation, there is a file (Word Document) By Barry Gordon entitled "Pronto Hex IR Format". Have you seen this document? It will give you a better understanding of the Pronto Hex IR Format.