Section
Sections are the broadest level. The current build exposes 22 sections that act as the first routing layer in the site.
Guide
NIC 2025 hierarchy
NIC 2025 is a hierarchy, not a flat list. Users who understand the hierarchy make better code decisions.
Division, Group and Class
Divisions (86), Groups (257) and Classes (463) are the comparison layers. They are where users should narrow the field before trusting a final Sub-class.
Sub-class
Sub-classes (1887) are the practical destination level. They are usually the final entries users care about when matching a business activity to NIC 2025.