Carrier profile · USDOT 2374322 · MC-1649086 · Updated Jun 13, 2026
Zachary M Rosburg
DBA CIRCLE Z
1 power unitavg 12.5 yrRegional · 3 statesCHARTER OAK, IA50/100
CARRIER ACTIVEMC-1649086 ACTIVE
Equipment
Haulable capacity (power units only — trailers are towed context), equipment mix, and the VIN-decoded unit roster. Click any VIN to trace that unit across every carrier that has run it.
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 1
- Observed power (24 mo)
- 2
- Trailers (towed)
- 4
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2024
Newest model yr
2005
Oldest model yr
50.0%
VINs decoded
Unit roster· VIN-decoded from inspections · NHTSA vPIC
| VIN | Type | Year | Make | Model | Insp. | Last seen |
|---|---|---|---|---|---|---|
| 1XKYD49X3RJ326823View sourced platform decode | Truck-Tractor | 2024 | KENWORTH | T680 | 2 | May 26, 2026 |
| 1XP5D49X05D863204View sourced platform decode | Truck-Tractor | 2005 | PETERBILT | 379 | 2 | Aug 21, 2024 |
| 1UYVS2535L2129070View sourced platform decode | Trailer | 2020 | UTIL | — | 1 | May 26, 2026 |
| 1W1ULS2KXBD539715View sourced platform decode | Trailer | 2011 | WILSON TRAILER CO. | Wilson Trailer Co. | 1 | Aug 5, 2025 |
| 4A2LD532781014108View sourced platform decode | Trailer | 2008 | MHEB | — | 1 | Aug 21, 2024 |
| 1W16532A1D5543648View sourced platform decode | Trailer | 2013 | WILX | — | 1 | Aug 20, 2024 |
Showing 6 · most-inspected first.