| 1018 | Kast Recherchebureau | 020 4933262 |
| Amsterdam | website |
| 1043 | Nederlands Recherche Bureau NRB | 020 750 08 85 |
| Amsterdam | website |
| 1693 | Recherchebureau Delict | 0228 58 42 50 |
| Wervershoof | website |
| 1850 | Recherche en Beveiligingsbureau Veltmeijer BV | 061 090 20 99 |
| Heiloo | website |
| 2547 | Bongers, Detectivebureau W P | 070 3683800 |
| s Gravenhage | website |
| 2800 | J & E Dienstverlening & Beveiliging B.V. | 06 - 411 89 551 |
| Gouda | website |
| 2909 | Schaap Bruin Van Vliet Cs Bv | 010 2660900 |
| Capelle aan den IJssel | website |
| 3433 | QUSO Bedrijfsrecherche BV | 030 292 02 00 |
| Nieuwegein | website |
| 3781 | Bedrijfsrecherche Nederland Bv | 0342 477040 |
| Voorthuizen | website |
| 3962 | Leeuw & Partners, De | 0343 572345 |
| Wyk by Duurstede | website |
| 4336 | Ad Services | 06 24513060 |
| Middelburg | website |
| 5508 | Recherche-en Beveiligingsadviesbureau Reba | 040 255 66 81 |
| Veldhoven | website |
| 6706 | Cleveland, Detectivebureau | 0317 422225 |
| Wageningen | website |
| 6828 | Hartman Security Services BV | 026-3210366 |
| Arnhem | website |
| 7125 | Alkris, Detectives | 0543 478933 |
| Aalten | website |
| 7207 | Female Investigations | 06-46155272 |
| Zutphen | website |
| 7600 | CV-Recherche | 054 687 27 49 |
| Almelo | website |
| 8060 | K-2 Recherche- en Handelsinformatiebureau | 038 477 36 60 |
| Hasselt Zwolle | website |
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