| N B M Auto Agencies Ltd - Sale of motor vehicles |
| N I Private Ambulance - Other human health activities |
| N K Fencing - Manufacture of builders' carpentry and joinery |
| N Montgomery - Plumber |
| National Car Parks Ltd - Storage and warehousing |
| National Car Parks Ltd - Storage and warehousing |
| National Car Parks Ltd - Storage and warehousing |
| National Car Parks Ltd - Storage and warehousing |
| Nationwide Building Society - Bank |
| Nectar International Ltd - Manufacture of perfumes and toilet preparations |
| Neill - Retail sale of books, newspapers and stationary |
| Nina's Restaurant - Restaurant |
| North Belfast Mission Housing Society Ltd - Social work activities with accommodation |
| North Street - Repair boots, shoes and other articles of leather |
| Northern Ireland Housing Executive - General (overall) public service activities |
| Northern Ireland Railways Co Ltd - Transport via railways |
| Northern Ireland Railways Co Ltd - Transport via railways |
| Northern Water Treatment - Collection, purification and distribution of water |
| Northland Court - Social work activities with accommodation |
| Number 10 - Restaurant |
| Northern Ireland Railways Co. Ltd. - Passenger Rail Transportation Services |
| N.r Plumbing & Heating - Plumbing Heating & Air Cond Contractors |
| Nht Engineering Ltd - Design And Manufacturer Of Water Turbines |
| Number 10 - Cafeteria |
| North Street Shoe Repairs - Shoe Repair Shop |
| Niral Stainless Steel - Manufacturers Of Stainless Steel Ware |
| N.k. Fencing Ltd - Security Fencing Manufacturers And Erectors |
| Nu-Luk Wheels - Manufacturers Of Wheels |
| Newmills Hydro Generation Ltd - Hydro Electric Water Turbine Manufacturers |
| Nu-Luk Wheels - Auto Parts Store |
| Nijen Stainless Fabrications - Welder |
| Northern Loft Insulation Ltd - Insulation Contractor |
| New Look - Clothing Store |
| Nationwide Building Society - Building Society |
| N I Forklift Training - Technical School |