| Business | Phone |
| Arrow Investigations 324 Emerald Ave, San Carlos 94070 | (650) 610-9952 |
| Cobalt Services San Carlos 94070 | (650) 594-1010 |
| Fire Science Applications 751 Laurel St, San Carlos 94070 | (650) 363-0970 |
| Incognito Services Po Box 189, San Carlos 94070 | (650) 592-9707 |
| J A Stevenot & Assoc Po Box 60, San Carlos 94070 | (650) 595-5274 |
| Mid-Peninsula Investigative 2033 Belmont Ave # 43, San Carlos 94070 | (650) 571-5321 |
| Preferred Professional Po Box 636, San Carlos 94070 | (650) 631-7248 |
| Sturken & Assoc San Carlos 94070 | (650) 631-8998 |