| Business | Phone |
| Aaa Investigations Inc 6549 N 90th St, Milwaukee 53224 | (414) 353-6488 |
| Act 1 Investigation Svc Po Box 1814, Milwaukee 53201 | (414) 581-4615 |
| Al Villarreal Detective Agency 1127 S 37th St, Milwaukee 53215 | (414) 647-2035 |
| Ambrose Detective Agency Milwaukee 53202 | (414) 558-9470 |
| Armitage & Assoc 611 N Broadway 525, Milwaukee 53202 | (414) 276-7007 |
| Attorneys Process & Invstgtn 10855 W Potter Rd 3, Milwaukee 53226 | (414) 475-0872 |
| B K Kurczewski Investigations 316 E Silver Spring Dr 219, Milwaukee 53217 | (414) 962-7898 |
| David L Ballard 3116 W Kinnickinnic River Pkwy, Milwaukee 53215 | (414) 384-2897 |
| Broussard Investigations 2821 N 4th St, Milwaukee 53212 | (414) 374-4054 |
| Centurion Investigations Inc 312 E Wisconsin Ave, Milwaukee 53202 | (414) 278-8551 |
| Derrick Orr & Assoc 1456 N Farwell Ave # 21, Milwaukee 53202 | (414) 807-9277 |
| Discreet Investigations Llc Milwaukee 53214 | (414) 426-9260 |
| Eye One Ltd 322 E Michigan St, Milwaukee 53202 | (414) 291-0605 |
| Greenstreet Investigations 3312 S 15th St, Milwaukee 53215 | (414) 647-0770 |
| Kathleen Hornik Milwaukee 53209 | (414) 247-9558 |
| Interstate Reporting Co 5317 N 118th Ct, Milwaukee 53225 | (262) 251-6590 |
| Investigations Unlimited 6222 W Verona Ct, Milwaukee 53219 | (414) 321-9221 |
| Investigative Resources Po Box 340412, Milwaukee 53234 | (414) 525-8361 |
| Ira B Robins & Assoc Milwaukee 53223 | (414) 434-1030 |
| Isp Investigations Milwaukee 53226 | (414) 302-1972 |
| Kohl Investigations Milwaukee 53209 | (414) 352-1341 |
| Kvidera Investigations 207 E Buffalo St, Milwaukee 53202 | (414) 271-1977 |
| North Shore Investigations 5050 N Port Washington Rd, Milwaukee 53217 | (414) 962-2600 |
| Seagull Crow Inc 5202 W Wisconsin Ave, Milwaukee 53208 | (414) 475-7425 |
| Shadow Strategies 3801 N Prospect Ave, Milwaukee 53211 | (414) 962-8997 |
| Perales Investigations 1626 N Prospect Ave 1603, Milwaukee 53202 | (414) 347-4115 |
| Philip Gatewood & Assoc 312 E Wisconsin Ave, Milwaukee 53202 | (414) 276-5252 |
| Rose Investigation Milwaukee 53226 | (414) 258-7034 |
| Rucker Detective Agency 161 W Wisconsin Ave 3002, Milwaukee 53203 | (414) 271-5987 |