DBA: Duff Company
Duff Supply Co Inc is an active interstate carrier based in Norristown, PA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 5 | 5 | 0 |
| Total Power Units | 5 | ||
Distinct vehicles · 24 mo
vs 5 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 | 98% | 97% | Worse than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 68% | 80% | Around peer average |
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 | 0 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Unsafe Driving | 7 | 2 | 0 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 17, 2026 | PA | STRAIGHT TRUCK | 0 | 0 |
| Mar 17, 2026 | PA | STRAIGHT TRUCK | 2 | 0 |
| Feb 24, 2026 | PA | STRAIGHT TRUCK | 1 | 0 |
| Dec 26, 2025 | PA | STRAIGHT TRUCK | 1 | 0 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 6 | 8.72 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 2 | 0.80 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state PA accounts for 61% of activity. Activity outside home state (PA): 39%.
| Vehicle Maintenance |
| 2 |
| 0 |
| 0 |
| Nov 26, 2025 |
| NJ |
| STRAIGHT TRUCK |
| 0 |
| 0 |
| Oct 23, 2025 | PA | STRAIGHT TRUCK | 0 | 0 |
| Oct 14, 2025 | PA | STRAIGHT TRUCK | 0 | 0 |
| Oct 2, 2025 | PA | STRAIGHT TRUCK | 0 | 0 |
| Jun 30, 2025 | NJ | STRAIGHT TRUCK | 0 | 0 |
| Apr 18, 2025 | PA | STRAIGHT TRUCK | 2 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 17, 2026 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Mar 17, 2026 | 39395A4EEUS | Emergency Equipment - Fire Extinguishers - unsecured | Vehicle Maintenance | — |
| Feb 24, 2026 | 3922SLLIT | State/Local Laws - Improper turns | Unsafe Driving | — |
| Dec 26, 2025 | 39216D | Driver - Failed to use seat belt while operating a CMV | Unsafe Driving | — |
| Apr 18, 2025 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Apr 18, 2025 | 39282DUMT | Driver - Using a hand-held mobile telephone | Unsafe Driving | — |
| Apr 15, 2025 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Sep 23, 2024 | 3922C | Failure to obey traffic control device | Unsafe Driving | — |
| Apr 2, 2024 | 3939 | Inoperable Required Lamp | Vehicle Maintenance | — |