| Business | Phone |
| Ameritel 8910 Quartz Ave, Northridge 91324 | (818) 734-7400 |
| Krisken Electronics 17432 Devonshire St, Northridge 91325 | (818) 360-3107 |
| Just Phones Of Northridge 8932 Reseda Blvd # 106, Northridge 91324 | (818) 349-3777 |
| Intercom Systems 18252 Chase St, Northridge 91325 | (818) 882-4892 |