| .bnpparibas | Generic | BNP Paribas | — | — |
| .bo | Country Code | Agencia para el Desarrollo de la Información de la Sociedad en Bolivia | 🇧🇴Bolivia | — |
| .boats | Generic | XYZ.COM LLC | — | — |
| .boehringer | Generic | Boehringer Ingelheim International GmbH | — | — |
| .bofa | Generic | Bank of America Corporation | — | — |
| .bom | Generic | Núcleo de Informação e Coordenação do Ponto BR - NIC.br | — | — |
| .bond | Generic | Shortdot SA | — | — |
| .boo | Generic | Charleston Road Registry Inc. | — | — |
| .book | Generic | Amazon Registry Services, Inc. | — | — |
| .booking | Generic | Booking.com B.V. | — | — |
| .bosch | Generic | Robert Bosch GMBH | — | — |
| .bostik | Generic | Bostik SA | — | — |
| .boston | Generic | Registry Services, LLC | — | — |
| .bot | Generic | Amazon Registry Services, Inc. | — | — |
| .boutique | Generic | Binky Moon, LLC | — | — |
| .box | Generic | Intercap Registry Inc. | — | — |
| .br | Country Code | Comite Gestor da Internet no Brasil | 🇧🇷Brazil | — |
| .bradesco | Generic | Banco Bradesco S.A. | — | — |
| .bridgestone | Generic | Bridgestone Corporation | — | — |
| .broadway | Generic | Celebrate Broadway, Inc. | — | — |
| .broker | Generic | Dog Beach, LLC | — | — |
| .brother | Generic | Brother Industries, Ltd. | — | — |
| .brussels | Generic | DNS.be vzw | — | — |
| .bs | Country Code | University of The Bahamas | 🇧🇸Bahamas | — |
| .bt | Country Code | Ministry of Information and Communications | 🇧🇹Bhutan | — |
| .build | Generic | Plan Bee LLC | — | — |
| .builders | Generic | Binky Moon, LLC | — | — |
| .business | Generic | Binky Moon, LLC | — | — |
| .buy | Generic | Amazon Registry Services, INC | — | — |
| .buzz | Generic | DOTSTRATEGY CO. | — | — |
| .bv | Country Code | Norid A/S | 🇧🇻Bouvet Island | — |
| .bw | Country Code | Botswana Communications Regulatory Authority (BOCRA) | 🇧🇼Botswana | — |
| .by | Country Code | Belarusian Cloud Technologies LLC | 🇧🇾Belarus | — |
| .bz | Country Code | University of Belize | 🇧🇿Belize | — |
| .bzh | Generic | Association www.bzh | — | — |
| .ca | Country Code | Canadian Internet Registration Authority (CIRA) Autorité Canadienne pour les enregistrements Internet (ACEI) | 🇨🇦Canada | — |
| .cab | Generic | Binky Moon, LLC | — | — |
| .cafe | Generic | Binky Moon, LLC | — | — |
| .cal | Generic | Charleston Road Registry Inc. | — | — |
| .call | Generic | Amazon Registry Services, Inc. | — | — |
| .calvinklein | Generic | PVH gTLD Holdings LLC | — | — |
| .cam | Generic | CAM Connecting SarL | — | — |
| .camera | Generic | Binky Moon, LLC | — | — |
| .camp | Generic | Binky Moon, LLC | — | — |
| .canon | Generic | Canon Inc. | — | — |
| .capetown | Generic | ZA Central Registry NPC trading as ZA Central Registry | — | — |
| .capital | Generic | Binky Moon, LLC | — | — |
| .capitalone | Generic | Capital One Financial Corporation | — | — |
| .car | Generic | XYZ.COM LLC | — | — |
| .caravan | Generic | Caravan International, Inc. | — | — |