| Company Name | Address | City | State | Zip Code | Phone Number | Fax Number |
| ACCORD DETECTIVE AGENCY | 310 BUSSE HWY #309 | PARK RIDGE | IL | 60068 | (773) 458-3801 | (773) 631-7012 |
| AGB INVESTIGATIVE SERVICES INC | 2033 W 95TH ST | CHICAGO | IL | 60643 | (773) 445-4300 | |
| ALLIED BARTON SECURITY SERVICES | 1771 DIEHL RD, STE 200 | NAPERVILLE | IL | 60563 | (630) 369-6761 | (630) 369-8187 |
| AMERICAN HERITAGE PROTECTIVE | 5100 W 127TH ST | ALSIP | IL | 60803 | (708) 388-7900 | (708) 597-6989 |
| AP PRIVATE DETECTIVE AGENCY | 17084 WINCHESTER AVE | HAZELCREST | IL | 60429 | (708) 335-3500 | (708) 335-3507 |
| BLUE BOOK BUILDING, THE | 800 E MAIN ST | JEFFERSON VALLEY | NY | 10535 | (800) 431-2584 | (914) 243-4936 |
| COOK COUNTY IL | 118 N CLARK | CHICAGO | IL | 60602 | (312) 603-6852 | (312) 603-5909 |
| ELAM PRIVATE DETECTIVE INC | 200 E ALDER RD, STE C, PO BOX 157 | CANTON | IL | 61520 | (309) 647-8560 | (309) 647-9780 |
| G4S | 1016 EKSTAM DR | BLOOMINGTON | IL | 61704 | (309) 664-2155 | (309) 664-2995 |
| GLOBAL SECURITY SERVICES | 1003 W 4 ST | DAVENPORT | IL | 52732 | (563) 359-3896 | (563) 322-7191 |
| INNOVATIVE SYSTEMS INC | 9880 S RIDGEVIEW DR | OAK CREEK | WI | 53154 | (414) 761-7350 | (414) 761-7355 |
| JOHNSON CONTROLS FIRE PROTECTION LP | 91 N MITCHELL CT | ADDISON | IL | 60101 | (630) 948-1235 | (630) 948-1250 |
| MECCON INDUSTRIES INC | 2703 BERNICE RD | LANSING | IL | 60438 | (708) 474-8300 | (708) 474-8310 |
| PAGE SECURITY INC | 9453 S ASHLAND AVE, 2ND FL, STE 9 | CHICAGO | IL | 60620 | (773) 239-5256 | (773) 239-5647 |
| PRIME VENDOR INC | 4622 CEDAR AVE, BLDG 5, STE 123 | WILMINGTON | NC | 28403-6916 | (800) 746-9554 | (910) 726-1973 |
| SECURITAS SECURITY SVCS | 1333 BUTTERFIELD RD | DOWNERS GROVE | IL | 60515 | (630) 441-7260 | (630) 963-1852 |
| SECURITY PROFESSIONALS OF ILLINOIS | 7120 WINDSOR PKWY #102 | LOVES PARK | IL | 61111 | (815) 637-6950 | (815) 637-6955 |
| SIGNAL 88 SECURITY CHICAGO | 1465 W CHICAGO AVE | CHICAGO | IL | 60642 | (312) 909-0171 | (312) 491-1815 |
| ST MORITZ SECURITY SVCS INC | 4600 CLAIRTON BLVD | PITTSBURGH | PA | 15236 | (412) 885-3144 | (412) 942-0715 |
| U S SECURITY ASSOC INC | 18425 W CREEK DR, STE A | TINLEY PK | IL | 60477 | (877) 340-1835 | (312) 285-2539 |