| 00965WB | N.E.L. (Services) Ltd | YES | YES | | N/A | N/A | YES | YES | YES | Reg-Pending |
| 00281W | NAA Appliances Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00425W | National Electrical Wholesalers (Irl) Ltd | YES | NO | Ced Century Electrical Distributors | YES | YES | YES | YES | YES | YES |
| 00162WB | National Hardware Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00593WB | National Instruments Corporation (UK) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00613WB | National Pen Ltd | YES | NO | | YES | YES | YES | WEEE YES | Reg-Pending | Reg-Pending |
| 01553WB | National Pen Promotional Products Ltd | YES | YES | | N/A | N/A | N/A | N/A | N/A | Reg-Pending |
| 00771W | Naturalife Health | YES | NO | | YES | YES | YES | YES | YES | YES |
| 01510W | Navsync Ltd | YES | YES | | NO | NO | NO | NO | Reg-Pending | Reg-Pending |
| 00466WB | NCR Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00355W | Nellcor Puritan Bennett Ireland | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00840W | Neopost Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00907W | Nespresso UK Ltd | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |
| 00183 | Netcom Communications Ltd | YES | NO | | YES | NO | NO | NO | NO | NO |
| 01059WB | NetCore Solutions Ltd | YES | YES | | N/A | Reg-Pending | Reg-Pending | Reg-Pending | NO | NO |
| 00866WB | Netgear International Ltd | YES | YES | | N/A | YES | YES | YES | YES | YES |
| 01000WB | Network Fitness Supplies | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 01111W | New Era Lighting Ltd | YES | NO | | YES | N/A | N/A | YES | YES | YES |
| 01317WB | New Look Retailers (Ireland) Ltd | YES | YES | | N/A | N/A | N/A | N/A | YES | YES |
| 00376WB | Next Retail Ltd | YES | YES | Next | YES | YES | YES | YES | YES | YES |
| 01397W | NHCS Ltd | YES | NO | IrishWireless.NET | N/A | N/A | N/A | N/A | YES | YES |
| 01202B | Niall Stephenson Ltd | NO | YES | | N/A | N/A | N/A | YES | YES | YES |
| 01461WB | Nike (UK) Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01463WB | Nike Retail B.V. | YES | YES | Nike Retail Ireland | YES | YES | YES | YES | YES | YES |
| 00804WB | Nikon UK Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 00432W | Nilfisk-Advance Ltd | YES | NO | Nilfisk-Advance, Nilfisk-Alto | YES | YES | YES | YES | YES | YES |
| 00869WB | Nisbets Plc | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01203B | Nissan Ireland | NO | YES | | N/A | N/A | N/A | YES | YES | YES |
| 00123WB | Noel F. Kenny Electrical Ltd | YES | YES | Kenny Distributors | YES | YES | YES | YES | YES | YES |
| 00130WB | Nokia (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | YES | Reg-Pending |
| 00793W | Nokia Siemens Networks Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00303W | Normac Ltd | YES | NO | | YES | YES | YES | YES | YES | YES |
| 00085WB | Nortel Networks (Ireland) Ltd | YES | YES | | YES | YES | YES | YES | Reg-Pending | Reg-Pending |
| 01084WB | Northwood Technology Limited | YES | YES | | N/A | YES | YES | YES | YES | YES |
| 01047WB | Norton & Co Ltd | YES | YES | Norton Group | YES | YES | YES | YES | YES | YES |
| 00413WB | Novar Ireland Ltd | YES | YES | | YES | YES | YES | YES | YES | YES |
| 01063W | Nualight Ltd | YES | NO | Nualight | N/A | YES | YES | YES | YES | Reg-Pending |
| 00944W | Nutricia Ireland Ltd | YES | NO | | YES | YES | YES | YES | YES | Reg-Pending |