| Entity Name | Type | License # | City | Status | Action |
|---|---|---|---|---|---|
| NATIONAL GUARDIAN SECURITY SERVICES CORP | Business | 127000749 | ELMHURST | NOT RENEWED | Verify |
| NATIONAL GUARDIAN SECURITY SERVICES CORP | Business | 118000072 | ROCKFORD | NOT RENEWED | Verify |
| NATIONAL GUARDIAN SECURITY SERVICES CORP | Business | 123000073 | ROCKFORD | NOT RENEWED | Verify |
| NATIONAL GUARDIAN SECURITY SERVICES CORP | Business | 117000141 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL INDUSTRIAL SECURITY CORP | Business | 122000291 | FAIRVIEW HEIGHTS | NOT RENEWED | Verify |
| NATIONAL INDUSTRIAL SECURITY CORP | Business | 127000391 | FAIRVIEW HEIGHTS | CANCELLED | Verify |
| NATIONAL INVESTIGATION BUREAU INC | Business | 201000024 | HINSDALE | CLOSED | Verify |
| NATIONAL INVESTIGATION SERVICES INC | Business | 117001180 | GRAYSLAKE | NOT RENEWED | Verify |
| NATIONAL INVESTIGATIONS INC | Business | 122001000 | CHANNAHON | NOT RENEWED | Verify |
| NATIONAL INVESTIGATIONS INC | Business | 117000916 | CHANNAHON | ACTIVE | Verify |
| NATIONAL INVESTIGATIVE SERVICE AGCY | Business | 201000211 | VERNON HILLS | ACTIVE | Verify |
| NATIONAL INVESTIGATIVE SERVICES CORP | Business | 117000529 | HINSDALE | NOT RENEWED | Verify |
| NATIONAL INVESTIGATORS & SECURITY AGENCY INC | Business | 122001026 | OAK FOREST | NOT RENEWED | Verify |
| NATIONAL INVESTIGATORS & SECURITY AGENCY INC | Business | 102000271 | OAK FOREST | ACTIVE | Verify |
| NATIONAL K-9 SECURITY | Business | 117000617 | CHICAGO | INOPERATIVE | Verify |
| NATIONAL K-9 SECURITY INC | Business | 122000411 | CHICAGO | INOPERATIVE | Verify |
| NATIONAL POLICE AND | Business | 102000127 | NORTHBROOK | ACTIVE | Verify |
| NATIONAL PROCESS SERVICE | Business | 117001947 | BOURBONNAIS | ACTIVE | Verify |
| NATIONAL PROTECTION AND INVESTIGATION AGENCY INC | Business | 117001695 | CHICAGO | ACTIVE | Verify |
| NATIONAL RESEARCH AGENCY | Business | 117000102 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL SEC PATROL & INVESTIGATION AGCY | Business | 117000427 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL SEC PATROL & INVESTIGATION AGCY | Business | 122000371 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL SECURITY AGENCY INC | Business | 122000949 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL SECURITY CONSULTANTS INC | Business | 117000499 | CHICAGO HEIGHTS | NOT RENEWED | Verify |
| NATIONAL SECURITY LOCK AND SAFE, INC. | Business | 192000181 | ROCK ISLAND | NOT RENEWED | Verify |
| NATIONAL SECURITY LTD | Business | 122000487 | OLYMPIA FIELDS | NOT RENEWED | Verify |
| NATIONAL SECURITY LTD | Business | 102000130 | OLYMPIA FIELDS | ACTIVE | Verify |
| NATIONAL SECURITY LTD | Business | 123000104 | CHICAGO | NOT RENEWED | Verify |
| NATIONAL SECURITY LTD | Business | 117000579 | OLYMPIA FIELDS | NOT RENEWED | Verify |
| NATIONAL SECURITY SERVICES INC | Business | 127001069 | EVERGREEN PARK | NOT RENEWED | Verify |
| NATIONAL SECURITY SYSTEMS INC | Business | 127000789 | ROLLING MEADOWS | NOT RENEWED | Verify |
| NATIONAL SECURITY TRAINING ACADEMY | Business | 102000060 | BERWYN | ACTIVE | Verify |
| NATIONWIDE ALARM CO INC | Business | 127000560 | CHICAGO | NOT RENEWED | Verify |
| NATIONWIDE BACKGROUND SCREENING INC | Business | 117001790 | CHICAGO | ACTIVE | Verify |
| NATIONWIDE PROTECTIVE SERVICE INC | Business | 122000977 | CHICAGO | NOT RENEWED | Verify |
| NATIONWIDE SECURITY & INVEST INC | Business | 117000349 | CHICAGO | NOT RENEWED | Verify |
| NATIONWIDE SECURITY AND INVESTS INC | Business | 122000259 | CHICAGO | NOT RENEWED | Verify |
| NATIONWIDE SECURITY INC | Business | 128000129 | RIVERSIDE | CANCELLED | Verify |
| NATIONWIDE SECURITY INC | Business | 127001075 | MOMENCE | NOT RENEWED | Verify |
| NATIONWIDE SECURITY SERVICES INC | Business | 117001128 | BLOOMINGDALE | NOT RENEWED | Verify |
| NATL DETECTIVE AGCY AND GUARD SERV INC | Business | 122000344 | LINCOLNWOOD | NOT RENEWED | Verify |
| NATL DETECTIVE AGCY AND GUARD SERV INC | Business | 117000161 | LINCOLNWOOD | NOT RENEWED | Verify |
| NATL INVESTIGATORS & SECURITY AGCY INC | Business | 117001337 | OAK FOREST | NOT RENEWED | Verify |
| NATL INVESTIGATORS & SECURITY AGCY INC | Business | 123000309 | CHICAGO | NOT RENEWED | Verify |
| NATL INVESTIGATORS & SECURITY AGCY INC | Business | 118000241 | CHICAGO | NOT RENEWED | Verify |
| NAVIGANT CONSULTING (PI) LLC | Business | 117001522 | CHICAGO | NOT RENEWED | Verify |
| NAVIGANT CONSULTING INC | Business | 117001439 | CHICAGO | NOT RENEWED | Verify |
| NAVY PIER, INC | Business | 120500177 | CHICAGO | ACTIVE | Verify |
| NBE INC | Business | 127000376 | CHICAGO RIDGE | NOT RENEWED | Verify |
| NCK SECURITY SERVICES | Business | 122001098 | OAKBROOK TERRACE | NOT RENEWED | Verify |