| Frequency | System | FleetID | User | City | State | Sys_Type | Notes | Additional Notes |
| 856.76250 | Primary | Chicago | IL | Motorola Type II Smartnet | ** | ** | ||
| 857.76250 | Primary | ****EMERGENCY/MUTUAL AID TALKGR**** | Chicago | IL | Motorola Type II Smartnet | ** | ** | |
| 858.76250 | Primary | 49840 | EMERGENCY H EMERGENCY H EMERGENCY OPS | Chicago | IL | Motorola Type II Smartnet | ** | ** |
| 859.71250 | Primary | 50000 | EMERGENCY M EMERGENCY M EMERGENCY OPS | Chicago | IL | Motorola Type II Smartnet | ** | ** |
| 859.76250 | Primary | Chicago | IL | Motorola Type II Smartnet | ** | ** | ||
| 860.71250 | Primary | ****PUBLIC SAFETY TALKGR**** | Chicago | IL | Motorola Type II Smartnet | ** | ** | |
| 860.76250 | Primary | Chicago | IL | Motorola Type II Smartnet | ** | ** | ||
| 49872 | CHI POLICE CHICAGO POLICE (@ O'HARE) LAW DISPATCH | ** | ** | |||||
| 49904 | CHI FIRE CHICAGO FIRE (@ O'HARE) FIRE DISPATCH | ** | ** | |||||
| 49968 | DOA POLICE DEPARTMENT OF AVIATION: POLICE LAW DISPATCH | ** | ** | |||||
| 50062 | SEC ACC CNTR DEPARTMENT OF AVIATION: SECURITY ACCESS CONTROL LAW TAC | ** | ** | |||||
| ** | ** | |||||||
| ****FEDERAL TALKGR**** | ** | ** | ||||||
| 50032 | FEDERALDETAI DETAIL (FEDS) FEDERAL | ** | ** | |||||
| ** | ** | |||||||
| ****OPERATIONS TALKGR**** | ** | ** | ||||||
| 49616 | DOA DISPATCH DEPARTMENT OF AVIATION: DISPATCH OTHER | ** | ** | |||||
| 49648 | TRADES TRADES BUSINESS | ** | ** | |||||
| 49680 | ELECTRICIANS ELECTRICIANS BUSINESS | ** | ** | |||||
| 49712 | HEAT&REFRIG; HEATING/REFRIGERATION BUSINESS | ** | ** | |||||
| 49744 | CONSTRUCTI CONSTRUCTION BUSINESS | ** | ** | |||||
| 49776 | TRAVELERSAID TRAVELER'S AID BUSINESS | ** | ** | |||||
| 49808 | CAB SPOTTERS CAB SPOTTERS (LANDSIDE) BUSINESS | ** | ** | |||||
| 49936 | OPERATIONS OPERATIONS OTHER | ** | ** | |||||
| 50064 | ACCESS CNTRL ACCESS CONTROL BUSINESS | ** | ** | |||||
| 50096 | MECHAN SHOP MECHANICAL SHOP BUSINESS | ** | ** | |||||
| 50128 | BROOM 8 BROOM 8 PUBLIC WORKS | ** | ** | |||||
| 50160 | BROOM 9 BROOM 9 PUBLIC WORKS | ** | ** | |||||
| 50480 | RADIO TECHS RADIO TECHS OTHER | ** | ** | |||||
| 50544 | TMA AGENTS CITY OPERATIONS - TMA AGENTS (7/14/08) BUSINESS | ** | ** | |||||
| ** | ** | |||||||
| ****SNOW/DE-ICING OPERATIONS TALKGR**** | ** | ** | ||||||
| 4528 | SNOW OPS SNOW OPERATIONS PUBLIC WORKS | ** | ** | |||||
| 50192 | SNOW 1 SNOW 1 PUBLIC WORKS | ** | ** | |||||
| 50224 | SNOW 2 SNOW 2 PUBLIC WORKS | ** | ** | |||||
| 50256 | DE-ICER 3 DE-ICER 3 PUBLIC WORKS | ** | ** | |||||
| 50288 | DE-ICER 4 DE-ICER 4 PUBLIC WORKS | ** | ** | |||||
| 50320 | DE-ICER 7 DE-ICER 7 PUBLIC WORKS | ** | ** | |||||
| 50352 | DE-ICER 5&6 DE-ICER 6 & 5 PUBLIC WORKS | ** | ** | |||||
| 50384 | SANDERS SANDERS PUBLIC WORKS | ** | ** | |||||
| 50416 | SALTERS SALTERS PUBLIC WORKS | ** | ** | |||||
| ** | ** | |||||||
| ****UNIDENTIFIED USERS TALKGR**** | ** | ** | ||||||
| 50448 | UNID 50448 UNIDENTIFIED USAGE OTHER | ** | ** | |||||
| 50512 | UNI D50512 UNIDENTIFIED USAGE OTHER | ** | ** |