| .nissay | Generic | Nippon Life Insurance Company | — | — |
| .nokia | Generic | Nokia Corporation | — | — |
| .norton | Generic | Gen Digital Inc. | — | — |
| .now | Generic | Amazon Registry Services, Inc. | — | — |
| .nowruz | Generic | Emergency Back-End Registry Operator Program - ICANN | — | — |
| .nowtv | Generic | Starbucks (HK) Limited | — | — |
| .nra | Generic | National Rifle Association of America | — | — |
| .nrw | Generic | Minds + Machines GmbH | — | — |
| .ntt | Generic | NIPPON TELEGRAPH AND TELEPHONE CORPORATION | — | — |
| .nyc | Generic | The City of New York by and through the New York City Department of Information Technology & Telecommunications | — | — |
| .obi | Generic | OBI Group Holding SE & Co. KGaA | — | — |
| .observer | Generic | Fegistry, LLC | — | — |
| .office | Generic | Microsoft Corporation | — | — |
| .okinawa | Generic | BRregistry, Inc. | — | — |
| .olayan | Generic | Competrol (Luxembourg) Sarl | — | — |
| .olayangroup | Generic | Competrol (Luxembourg) Sarl | — | — |
| .ollo | Generic | Dish DBS Corporation | — | — |
| .omega | Generic | The Swatch Group Ltd | — | — |
| .one | Generic | One.com A/S | — | — |
| .ong | Generic | Public Interest Registry | — | — |
| .onl | Generic | Jolly Host, LLC | — | — |
| .online | Generic | Radix Technologies Inc. SEZC | — | — |
| .ooo | Generic | INFIBEAM AVENUES LIMITED | — | — |
| .open | Generic | American Express Travel Related Services Company, Inc. | — | — |
| .oracle | Generic | Oracle Corporation | — | — |
| .orange | Generic | Orange Brand Services Limited | — | — |
| .org | Generic | Public Interest Registry (PIR) | — | — |
| .organic | Generic | Identity Digital Limited | — | — |
| .origins | Generic | The Estée Lauder Companies Inc. | — | — |
| .osaka | Generic | Osaka Registry Co., Ltd. | — | — |
| .otsuka | Generic | Otsuka Holdings Co., Ltd. | — | — |
| .ott | Generic | Dish DBS Corporation | — | — |
| .ovh | Generic | OVH SAS | — | — |
| .page | Generic | Charleston Road Registry Inc. | — | — |
| .panasonic | Generic | Panasonic Corporation | — | — |
| .paris | Generic | City of Paris | — | — |
| .pars | Generic | Emergency Back-End Registry Operator Program - ICANN | — | — |
| .partners | Generic | Binky Moon, LLC | — | — |
| .parts | Generic | Binky Moon, LLC | — | — |
| .party | Generic | Blue Sky Registry Limited | — | — |
| .pay | Generic | Amazon Registry Services, Inc. | — | — |
| .pccw | Generic | PCCW Enterprises Limited | — | — |
| .pet | Generic | Identity Digital Limited | — | — |
| .pfizer | Generic | Pfizer Inc. | — | — |
| .pharmacy | Generic | National Association of Boards of Pharmacy | — | — |
| .phd | Generic | Charleston Road Registry Inc. | — | — |
| .philips | Generic | Koninklijke Philips N.V. | — | — |
| .phone | Generic | Dish DBS Corporation | — | — |
| .photo | Generic | Registry Services, LLC | — | — |
| .photography | Generic | Binky Moon, LLC | — | — |