| Business | Phone |
| Investigative Research Group 857 Consortium Crt, London N6E 2S8 | (519) 471-6401 |
| J Rivard & Assoc 307 Commissioners Rd W #D, London N6J 1Y4 | (519) 641-3140 |
| Kenway Investigations 135 Albert St, London N6A 1L9 | (519) 439-2094 |
| Keyfacts Canada 553 Southdale Rd E #204, London N6E 1A2 | (519) 680-2286 |
| King-Reed & Assoc Invstgtn 231 Wharncliffe Rd S, London N6J 2L3 | (519) 438-8038 |
| Lord Investigations 135 Albert St, London N6A 1L9 | (519) 432-6303 |
| Mc Innes & Assoc 21 King St #122, London N6A 5H3 | (519) 433-2020 |
| Northwood & Assoc 151 York St, London N6A 1A8 | (519) 858-1052 |
| Peel Investigative Consultants 1579 Hyde Park Rd #200, London N6H 5L4 | (519) 657-1231 |
| Sprague Investigation 564 Huntingdon Dr, London N6C 4J4 | (519) 649-4494 |
| C R Devine & Assoc Inc 180 Arbour Glen Cres #104, London N5Y 2A4 | (519) 432-4023 |
| Cis Corporate Investigation 2410 Main St, London N6P 1R1 | (519) 652-2163 |
| Corporate Inquiry Stystems Po Box 459 Stn Lambeth, London N6P 1R1 | (519) 652-1008 |
| Cortlaw Services Ltd 30 Adelaide St N #20, London N6B 3N5 | (519) 663-1030 |