| Business | Phone |
| Advanced Communication Newark 19711 | (302) 737-3897 |
| American Protection Inc 102 E Main St, Newark 19711 | (302) 452-0300 |
| National Security 2644 Kirkwood Hwy # 360, Newark 19711 | (302) 286-6641 |
| Total Security Alarm Svc 18 Albe Dr # C, Newark 19702 | (302) 455-9800 |
| Trs Security Inc 12 Prestbury Sq, Newark 19713 | (302) 738-1332 |