| Business | Phone |
| Everguard Security Systems 12541 Loma Rica Dr # B, Grass Valley 95945 | (530) 272-4755 |
| Adt-Security Link-Tvr Grass Valley 95945 | (530) 272-1262 |
| All American Security Inc Grass Valley 95945 | (530) 273-0009 |
| J M Securities 12881 Chatsworth Ln, Grass Valley 95945 | (530) 273-1135 |
| Patriot Alarms Grass Valley 95945 | (916) 521-0510 |