| Business | Phone |
| All Counties Investigation Svc 1365 Main St # 4, Springfield 1103 | (413) 734-4900 |
| Callahan Desmond Investigation 101 State St, Springfield 1103 | (413) 746-9600 |
| Hettrick Cyr & Assoc Inc Springfield 1103 | (413) 781-8517 |
| Investigative & Forensic Svc Springfield 1103 | (413) 827-0071 |
| Investigative Concepts Po Box 30112, Springfield 1103 | (413) 732-9111 |
| J Simmons Investigation 1242 Main St, Springfield 1103 | (413) 733-5001 |
| Private Investigators 21 Stockbridge St, Springfield 1103 | (413) 734-5419 |
| Private Investigators-New 1500 Main St, Springfield 1115 | (413) 734-5127 |
| Superior Investigative Svc 340 Cooley St, Springfield 1128 | (413) 244-9340 |