Diamond Trucking Inc is an active interstate carrier based in Phoenix, AZ.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 76 | 0 | 0 |
| Tractors | 68 | 8 | 0 |
| Total Power Units | 76 | ||
Distinct vehicles · 24 mo
vs 76 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 90% | 91% | Worse than most peers |
| HOS Compliance | 67% | 91% | Around peer average |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 28% | 79% | Better than most peers |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 2 | — | 22.26% |
| Hazmat | 118 | 0 | 0.00% |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Apr 1, 2025 | 0 | 0 | 2 | 2 |
| Jul 1, 2024 | 0 | 0 | 3 | 3 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 27 | 2 | 1 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 21, 2026 | NM | TRUCK TRACTOR | 1 | 0 |
| Mar 6, 2026 | AZ | TRUCK TRACTOR | 0 | 0 |
| Mar 6, 2026 | AZ | TRUCK TRACTOR | 0 | 0 |
| Feb 25, 2026 | KS | TRUCK TRACTOR | 1 | 0 |
| Feb 20, 2026 |
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| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 7 | 0.72 | — |
| HOS Compliance | 5 | 0.05 | — |
| Vehicle Maintenance | 20 | 0.86 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 7 states. Top state AZ accounts for 72% of activity. Activity outside home state (AZ): 28%.
+2 other states with fewer inspections
| Hazardous Materials Compliance | 9 | 4 | 1 |
| Unsafe Driving | 7 | 2 | 0 |
| Hours-of-Service Compliance | 5 | 1 | 0 |
| AZ |
| TRUCK TRACTOR |
| 1 |
| 0 |
| Feb 18, 2026 | AZ | TRUCK TRACTOR | 0 | 0 |
| Feb 13, 2026 | KS | TRUCK TRACTOR | 0 | 0 |
| Feb 13, 2026 | KS | TRUCK TRACTOR | 0 | 0 |
| Feb 11, 2026 | OK | TRUCK TRACTOR | 2 | 0 |
| Feb 10, 2026 | AZ | TRUCK TRACTOR | 3 | 1 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 21, 2026 | 3963A1LC | Brake - Leak from air chamber | Vehicle Maintenance | — |
| Feb 25, 2026 | 3922SLLML | State/Local Laws - Failure to maintain lane | Unsafe Driving | — |
| Feb 20, 2026 | 39355EB | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 | Vehicle Maintenance | — |
| Feb 11, 2026 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Feb 11, 2026 | 3963A1BALAC | Brake - Audible air leak from a brake chamber | Vehicle Maintenance | — |
| Feb 10, 2026 | 39375A3TAOL | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Vehicle Maintenance | Yes |
| Feb 10, 2026 | 393201AFRCLS | Frame - Cracked/loose/sagging/broken frame or chassis | Vehicle Maintenance | — |
| Feb 10, 2026 | 39355EB | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 | Vehicle Maintenance | — |
| Feb 8, 2026 | 3922LV | Lane Restriction violation | Unsafe Driving | — |
| Feb 5, 2026 | 172516C6HMPMC | HM (Placarding) - Failure to maintain placard(s) in a condition so that the format legibility color and visibility of the placard will not be substantially red | Hazardous Materials Compliance | — |