| !Facto | Tout Informatique et internet | ifacto.com |
| 1 Electricien | Electricians | groupedmn.com |
| 1001-Événements | Tout Arts et divertissement, Tout Entreprises et services | 1001-evenements.com |
| 100Douleurs.Com | Health and Beauty | 100douleurs.com |
| 1101 Rachel - InterRent | Apartments | facebook.com |
| 123 Plomberie & Chauffage Limite | Plumbing | — |
| 123renovation | Home Improvement | — |
| 1909 Taverne Moderne | Banquet Rooms | 1909tavernemoderne.com |
| 1976 Montreal Olympic Stadium | Tout Informations générales | pbs.org |
| 1E Avenue Music | Information Technologies (IT) | 1eavenuemusic.com |
| 1PAKT | Tout Informations générales | 1pakt.com |
| 1Pakt | Arts & Cultural Organizations & Centres | — |
| 2 Femme De Menage Menage Kalou | Cleaning Services, Cleaning Service | — |
| 211 Grand Montréal | Tout Informations générales | 211qc.ca |
| 211 Grand Montréal - Gatineau | Tout Communautés et société | 211qc.ca |
| 21k de Montréal | Tout Arts et divertissement, Tout Événements spéciaux | couronsmtl.com |
| 21st Century Food Services Inc. | Tout Commerces au détail | 21stcenturyfood.com |
| 24/7 TOWING MONTREAL / Survoltage Crevaison Dévérrouillage / | Boat Towing | 247-towing-montreal.business.site |
| 24h Tow Truck Montreal Car Accident Boost Scrap | Boat Towing | — |
| 2968-2978 Québec Inc | Bus & Coach Rental & Charter | facebook.com |
| 2D Électriciens Inc | Electricians | 2delectriciens.com |
| 2G Solutions | Tout Informatique et internet | 2gsolutions.com |
| 2Mc Plumbing Montréal Ltd. | Plumbing | — |
| 2MORO | Aerospace | 2moro.com |
| 3 Brasseurs | Bars, Beer & Ale, Brasseries, Brewers | les3brasseurs.ca |
| 3 femmes et un coussin | Tout Bars et restaurants, Tout Commerces au détail | 3f1c.com |
| 3 ST-Importations | Calendars | facebook.com |
| 3087-7864 Québec Inc | Car Repair | facebook.com |
| 31 Latitude | Beverage Dealers | — |
| 357C | Tout Communautés et société | le357c.com |
| 360 DTX | Health Services | 360dtx.com |
| 360 Medlink | Life Sciences and Health Technologies (LSHT) | 360medlink.com |
| 365 choses à faire à Montréal | Toutes les Pages perso | 365chosesafaireamontreal.wordpress.com |
| 375 000 arbres | Tout Communautés et société | 375000arbres.org |
| 37e AVENUE | Advertising Agencies | facebook.com |
| 3C Gallery | Art Galleries, Dealers & Consultants | 3cgallery.com |
| 3CI OSBL INC. | Bookkeeping Software & Accounting Systems | 3ci.ca |
| 3M Canada | Tout Entreprises et services | 3mcanada.ca |
| 4 Automobiles | Automobiles, car Dealers | 4automobiles.com |
| 4 Cats | Art Schools | 4cats.com |
| 4 Moons Pictures | Audiovisual Production Services | 4moonspictures.com |
| 41 Autoworks Ltd | Auto Repair Garages, Balancing Service, Not Profit, Car Repair | — |
| 411 Lease | Car Leasing | — |
| 417 Bus Line | Bus & Coach Rental & Charter | 417busline.com |
| 4CB Groupe | Air Conditioning Systems & Parts | — |
| 4Degrees Montreal | Information Technologies (IT) | 4degrees-colo.com |
| 5 Brush Painting | Painters | — |
| 5 Etoiles Electroniques Inc | Answering Machines & Equipment | facebook.com |
| 5 Star Cleaning Services | Cleaning Services, Cleaning Service | — |
| 514 Hébergement | Tout Informatique et internet | 514hebergement.com |
