There is a lot of data in this website; over half a million database records to start with. Most of the data is divided into one of two sections; Numbers and Codes.
Within each section, every category of data is presented in broadly the same way. Clicking on one of the links in the menus on the left will open the relevant list page. You can sort and filter this list as required, and use it to look at individual records in that category.
* Some of the list pages are not yet available, these are marked with the roadworks symbol.
* Some of the pages may take a little while to open, due to the amount of data that has to be processed.