| Business | Phone |
| Beneficial Investigation Svc Stamford 6902 | (203) 325-3444 |
| Securitas Security Svc Usa Inc 30 Oak St # 4, Stamford 6905 | (203) 316-4980 |
| Colucci Investigation 225 Courtland Ave, Stamford 6906 | (203) 324-1174 |
| Cra 191 Sawmill Rd, Stamford 6903 | (203) 968-0050 |