| Business | Phone |
| Ads Securite 1366 Ch De Chambly, Longueuil J4J 3X3 | (450) 677-0505 |
| Alarme 3s Enr 2453 Rue Saint-Georges, Longueuil J4K 4B1 | (450) 679-5431 |
| Alarme Technique Sl 1010 Boul Sainte-Foy, Longueuil J4K 1W2 | (450) 677-5757 |
| Alarmes Longueuil 3244 Rue Boismenu, Longueuil J4M 2X8 | (450) 442-1646 |
| Ats Securite 1019 Rue Saint-Michel, Longueuil J4J 1P1 | (450) 442-9117 |
| Pfb Entreprises Enr 1197 Rue Blainville, Longueuil J4M 1H7 | (450) 647-1217 |
| Williams Protection Elect Enr 1025 Rue Saint-Michel, Longueuil J4J 1P1 | (450) 677-0856 |
| Five Star Protection 2032 Ch De Chambly, Longueuil J4J 3Y2 | (450) 679-8351 |