| Business | Phone |
| Informatique Montmagny 171 Av Sainte-Marguerite, Montmagny G5V 2N1 | (418) 248-8932 |
| Microplus Cote-Sud 67 Rue Saint-Jean-Baptiste E, Montmagny G5V 1J9 | (418) 248-0074 |
| Multi Techniques Inc 4 Boul Tache E, Montmagny G5V 1B7 | (418) 248-2247 |
| Clef De Sol 80 Boul Tache O, Montmagny G5V 3A4 | (418) 248-2102 |