| 1999841 | T | Towing 841 | parking lot towing | Business |
| 1999842 | T | Powers Towing | Powers Towing (Hillside) | Business |
| 1999845 | T | trucking 9845 | trucking | Business |
| 1999857 | T | Racine tow 9857 | Racine wrecker | Business |
| 1999865 | T | School Bus 865 | school bus company (Chicago south side) | Business |
| 1999882 | T | Materials 882 | materials hauling | Business |
| 1999894 | T | Towing 894 | parking lot towing | Business |
| 1999896 | T | Waste 896 | waste hauling | Business |
| 1999899 | T | Pace West Cook | Pace Paratransit: West Cook County (O.O.S.?) | Transportation |
| 1999903 | T | Bus 903 | Downtown transit shuttles (Aries Charter?) | Transportation |
| 1999904 | T | Waste 904 | waste hauling | Business |
| 1999905 | T | Waste 905 | waste hauling (Waukegan area?) | Business |
| 1999910 | T | Bus 910 | bus company | Business |
| 1999920 | T | Shuttle 920 | Hotel Shuttle? | Business |
| 1999926 | T | AirShtlBus 926 | airport shuttle buses | Business |
| 1999929 | T | ShuttlBus 929 | Parking/Car Rental O'Hare shuttle buses | Business |
| 1999933 | T | Pace Bus 933 | Pace Bus MCRide | Business |
| 1999935 | T | Bus 935 | bus company | Business |
| 1999938 | T | Landscaping 938 | landscaping contractor (N Cook or Lake Co, 800-series units) | Business |
| 1999941 | T | Builder 941 | builder or general contractor | Business |
| 1999943 | T | Towing 943 | towing company | Business |
| 1999945 | T | Chicago 945 | pdvWireless dealer testing | Business |
| 1999952 | T | Towing 952 | towing company | Business |
| 1999953 | T | Towing 953 | towing company | Business |
| 1999956 | T | Materials 956 | materials haulers | Business |
| 1999958 | T | School Bus 958 | school bus | Schools |
| 1999960 | T | ShttlVan 960 | shuttle vans | Business |
| 1999962 | T | Chicago 962 | Polish or Russian language | Business |
| 1999963 | T | CorpRAC 963 | Corporate Rent a Car? (Midway Airport) | Business |
| 1999964 | T | CorpRAC 964 | Corporate Rent a Car? (Midway Airport) | Business |
| 1999972 | T | Materials 972 | Materials haulers | Business |
| 1999975 | T | Flood Bros. | Flood Brothers Disposal (Oakbrook Terrace) | Business |
| 1999977 | T | Buses 977 | Downtown transit shuttles? (Aries Charter?) | Transportation |
| 1999978 | T | Buses 978 | Downtown transit shuttles? (Aries Charter?) | Transportation |
| 1999979 | T | Buses 979 | Downtown transit shuttles? (Aries Charter?) | Transportation |
| 1999980 | T | Buses 980 | Downtown transit shuttles? (Aries Charter?) | Transportation |
| 1999981 | T | Snap Food 1 | SNAP! downtown Chicago food couriers | Business |
| 1999982 | T | Snap Food 2 | SNAP! downtown Chicago food couriers | Business |
| 1999986 | T | Chicago Comm | Chicago Communications | Business |
| 1999988 | T | Wrecker 988 | wrecker service, Milwaukee area | Business |
| 1999993 | T | Hotel Shuttle993 | O'Hare-area airport shuttle buses | Business |
| 1999994 | T | Ambulance 994 | D.P. Murphy Ambulance? (Grayslake) - 500-series units | EMS Dispatch |
| 1999997 | T | Chicago 997 | pdvWireless dealer testing | Business |
| 1999998 | T | Chicago 998 | pdvWireless dealer testing | Business |
