Diamond Trucking Inc
USDOT 491637 · MC-240905 · Phoenix, Arizona · Interstate for-hire carrier · 50–99 power units
Diamond Trucking Inc (dba Diamond Trucking) is a individual based in Phoenix, Arizona, registered with the FMCSA as an interstate carrier (authorized for hire). It reports 76 power units and 81 drivers, which ranks it #90 by fleet size among 134 active for-hire carriers with 50+ power units headquartered in Arizona. In the 24 months to Sep 24, 2026 its trucks were inspected 144 times – about 1.9 inspections per power unit. 1.4% of vehicle inspections and 0.0% of driver inspections ended with an out-of-service order, against 20.5% and 3.3% for carriers of the same size nationally. FMCSA records 5 reportable crashes in the last 24 months (2 injuries, 0 fatalities, 5 tow-away), or 6.6 per 100 power units versus 4.8 for its size band. Crash counts in FMCSA data do not indicate fault. Its registered cargo types are general freight, building materials, liquids / gases, chemicals, commodities dry bulk, construction.
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Registration and contact
| Legal name | Diamond Trucking Inc |
|---|---|
| DBA name | Diamond Trucking |
| USDOT number | 491637 |
| Operating authority (docket) | MC-240905 |
| Entity type | Authorized for Hire |
| Operation | Interstate |
| Business type | Individual |
| Physical address | 5701 W Van Buren St, Phoenix, AZ 85043 |
| Phone | (602) 278-7399 |
| First registered | Jul 21, 1992 |
| Last MCS-150 update | Jan 14, 2026 |
| Hazmat carrier | Yes |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 491637.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 0 | 0 | 0 |
| Truck tractors | 68 | 8 | 0 |
| Trailers | 0 | 0 | 0 |
- 1.07 drivers per power unit (national median for 50+ unit fleets: 0.99).
- 6,043,936 miles reported for 2025 – about 79,525 miles per power unit vs a 38,151 median for 50–99-unit fleets.
- 89% of listed equipment is owned rather than leased.
- 81 CDL drivers; 81 drivers operate interstate beyond 100 miles, 0 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 50–99-unit for-hire carriers nationally (5,500) and Arizona carriers with 50+ units (134).
| Measure | Diamond Trucking Inc | Same size, US | AZ average | |
|---|---|---|---|---|
| Vehicle out-of-service rate | 1.4% | 20.5% | 18.8% | 93% lower than average |
| Driver out-of-service rate | 0.0% | 3.3% | 1.3% | none recorded |
| Crashes per 100 power units | 6.6 | 4.8 | 4.5 | 38% higher than average |
| Inspections | 144 | 144 with a driver check, 139 with a vehicle check, 41 BASIC violations recorded, 132 hazmat-related | ||
| FMCSA safety rating | Satisfactory (rated Oct 1, 2008) | |||
Cargo carried
Similar carriers in Arizona
Closest fleet size and cargo mix among Arizona carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Solar Industries Inc USDOT 524112 | Tucson | 82 | 41 | 52 | 12.5% | 0 |
| Superior Bulk Inc USDOT 2325622 | Mayer | 96 | 125 | 67 | 18.5% | 12 |
| Zip Delivery Services LLC USDOT 4151097 | Tucson | 100 | 100 | 21 | 20.0% | 0 |
| Cactus Transport II LLC USDOT 69357 | Phoenix | 120 | 293 | 21 | 43.8% | 2 |
| Harvey Trucking Inc USDOT 468159 | Tucson | 77 | 42 | 17 | 53.3% | 2 |
| Desert Ready Mix LLC USDOT 2517747 | Mesa | 85 | 104 | 10 | 22.2% | 0 |
Other carriers near Phoenix
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Swift Transportation Company of Arizona LLC USDOT 54283 | Phoenix | 12,940 | 12,883 | 22,217 | 19.5% | 802 |
| Knight Transportation Inc USDOT 428823 | Phoenix | 3,200 | 3,200 | 6,687 | 18.7% | 185 |
| Allied Waste Transportation Inc USDOT 704220 | Phoenix | 1,306 | 1,059 | 191 | 24.8% | 27 |
| New Legend Inc USDOT 1419483 | Phoenix | 950 | 900 | 1,659 | 15.1% | 46 |
| Allied Services LLC USDOT 731232 | Phoenix | 939 | 834 | 447 | 39.7% | 62 |
| Shamrock Foods Company USDOT 54336 | Phoenix | 826 | 1,032 | 819 | 11.8% | 28 |
| Republic Services of Indiana Transportation LLC USDOT 1050420 | Phoenix | 820 | 692 | 112 | 75.0% | 42 |
| Republic Services of Ohio Transportation LLC USDOT 3035170 | Phoenix | 814 | 757 | 175 | 43.0% | 28 |
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FAQ
What is the USDOT number of Diamond Trucking Inc?
Diamond Trucking Inc is registered with USDOT number 491637 and operating authority MC-240905.
How many trucks does Diamond Trucking Inc have?
It reports 76 power units (76 tractors, 0 straight trucks) and 0 trailers, with 81 drivers, on its last MCS-150 update (Jan 14, 2026).
Where is Diamond Trucking Inc located?
Its registered physical address is in Phoenix, Arizona 85043.
What is the out-of-service rate of Diamond Trucking Inc?
Over 24 months, 1.4% of vehicle inspections and 0.0% of driver inspections resulted in an out-of-service order (same-size national average: 20.5% vehicle, 3.3% driver).
Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.