| 68 | D | Chicago BoardUp | Chicago Board-Up Services | Business |
| 70 | D | paving 70 | road/street paving operations | Business |
| 87 | D | Park N Jet ORD | Park-N-Jet Chicago (O'Hare Parking and Hotel Shuttle) | Business |
| 92 | D | Edward/LoyolaAmb | Loyola Medicine Transport (400s), Edward Ambulance Services (900s) | EMS Dispatch |
| 97 | D | RC Topsoil | RC Topsoil (Lake Barrington) | Business |
| 98 | D | AdvancedSecurity | Advanced Security Solutions (Des Plaines) | Security |
| 105 | D | materials 105 | materials trucking | Business |
| 107 | D | NAPA 317, 318 | NAPA Auto Parts Stores 317 (Countryside) / 318 (Lyons) | Business |
| 111 | D | intermodal 111 | intermodal operations | Business |
| 125 | D | materials 125 | materials trucking ops, includes Estrada Transport (Berwyn) | Business |
| 133 | D | materials 133 | materials hauling? concrete company? | Business |
| 149 | D | Freedom EMS | Freedom EMS (Wilmington) | EMS Dispatch |
| 153 | D | ActionK9Security | Action K-9 Security (CTA 'L' stations) | Security |
| 186 | D | K-5 Construction | K-Five Construction | Business |
| 252 | D | dump trucks | dump trucks | Business |
| 273 | D | NU Chgo Shuttles | Northwestern University (Chicago) Train Shuttle Buses | Transportation |
| 295 | D | LoyolaMedicalNEV | Loyola Medicine Transport: Non-Emergency Vans | Transportation |
| 306 | D | ILC 306 | Intermodal Logistics Center? (Elwood, IL) | Business |
| 307 | D | ILC 307 | Intermodal Logistics Center? (Elwood, IL) | Business |
| 1047 | D | UPRR Police | Union Pacific Railroad Police (out of service?) | Law Dispatch |
| 1103 | D | Ridge Ambulance | Ridge Ambulance (Montgomery) | EMS Dispatch |
| 1110 | D | NtnwideRailSvcs | Nationwide Rail Services (Burr Ridge) - Intermodal Ops | Business |
| 1136 | D | taxi 1136 | taxi company (Joliet area) | Transportation |
| 1144 | D | AT 1144 | "AT" RID aliases | Business |
| 2256 | D | AGB Investigativ | AGB Investigative Services (security, Chicago) | Security |
| 3065 | D | RKW Redi Mix | RKW Redi Mix (Burlington, WI) | Business |
| 3068 | D | Pace Paratrans 1 | Pace Paratransit (First Transit): Channel 1 | Transportation |
| 3069 | D | Pace Paratrans 2 | Pace Paratransit (First Transit): Channel 2 | Transportation |
| 3070 | D | Pace Paratrans 3 | Pace Paratransit (First Transit): Channel 3 | Transportation |
| 3073 | D | UoC UGo Shuttle | University of Chicago UGo Shuttle Service | Transportation |
| 3084 | D | materials 3084 | materials trucking - possibly Tonyan Bros.? (Ringwood, IL) | Business |
| 3092 | D | Bnsv Dial a Ride | Bensenville (IL) Dial-a-Ride | Transportation |
