| 240 | T | WillisTwr Spare4 | "Spare 4" Talkgroup | Business |
| 243 | T | WillisTwr Elevtr | Elevator Maintenance | Business |
| 244 | T | WillisTwr Photo | Skydeck Ledge Photo Operations | Business |
| 247 | T | WillisTwr Hskpg | Housekeeping Operations | Business |
| 248 | T | WillisTwr 248 | Skydeck Operations? | Business |
| 249 | T | WillisTwr Skydk | Skydeck Tickets and Elevator Operations | Business |
| 250 | T | WillisTwr Elevtr | Elevator Maintenance | Business |
| 251 | T | WillisTwr Engrs | Building Engineers, Electricians, HVAC, etc. | Business |
| 252 | T | WillisTwr Hskpg | Housekeeping Operations | Business |
| 253 | T | WillisTwr Ops | Operations | Business |
| 254 | T | WillisTwr Secrty | Security Operations | Security |
