HaulerCheck · https://haulercheck.com/carrier/44035-duncan-son-lines-inc/ · Checked 2026-10-19 11:35 UTC · Census and inspections Oct 18, 2026 · Authority and insurance: Last known · FMCSA snapshot May 14, 2026
DUNCAN & SON LINES INC
Review before booking · 1 signal
How risk signals workFacts from the FMCSA record that call for a closer look. They are not a finding of wrongdoing. Authority and insurance are last known from May 14, 2026.
- Phone number shared with 4 other companiesNormal for dispatch services and related companies, but confirm who you are talking to.
No cargo cover filed with FMCSA
Green means the FMCSA record shows it. It does not confirm who you are talking to, or that a policy covers your specific load.
Not a live check. FMCSA has not published a Motus record for this carrier, so authority and insurance show the last known status from May 14, 2026. Confirm on Motus ↗ before booking.
What to verify next
- Confirm authority and insurance on the official Motus record ↗: our copy is the last known status from May 14, 2026. Safety record: SAFER ↗.
- Call back on the number on file, (623) 386-4511, not a number from an email or load board.
- Check that the MC number you were given is MC144606.
- Ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Insurance on file
Liability (BI&PD) pays for injury and damage to other people and property; it does not cover the freight. Cargo insurance covers the freight. FMCSA only requires cargo filings from household goods carriers and freight forwarders, so most carriers file none: ask for a cargo certificate that fits your load. No cargo cover filed with FMCSA.
| Type | Docket | Layer | Insurer | Coverage | Effective | Status |
|---|---|---|---|---|---|---|
| Liability (BI&PD) | MC144606 | Primary | NATIONAL INTERSTATE INSURANCE COMPANY Policy DUN 8199969-01 · 91X | $1,000,000 | Sep 15, 2021 | Active |
Source: Last known · FMCSA snapshot May 14, 2026. Identical filings repeated in the FMCSA data are shown once; a filing listed under two dockets is one policy, not extra coverage. Coverage is the maximum amount filed with FMCSA, not the full policy.
Last known filings. Insurance for this carrier comes from the FMCSA snapshot of May 14, 2026. Policies may have been cancelled or replaced since. Confirm current filings: Motus record ↗ and ask the insurer for a certificate naming you as holder.
Roadside inspections Oct 18, 2024 – Oct 18, 2026
41 of 327 · Arizona avg 22.3%
5 of 418 · Arizona avg 4.5%
10 most recent inspections
| Date | State | Level | Violations | Out of service |
|---|---|---|---|---|
| Oct 5, 2026 | CA | 1 | 0 | No |
| Sep 24, 2026 | CA | 1 | 2 | No |
| Sep 24, 2026 | US | 3 | 0 | No |
| Sep 24, 2026 | AZ | 2 | 1 | No |
| Sep 22, 2026 | CA | 1 | 1 | Yes |
| Sep 22, 2026 | WA | 2 | 2 | No |
| Sep 18, 2026 | CA | 1 | 0 | No |
| Sep 16, 2026 | NM | 2 | 1 | No |
| Sep 15, 2026 | CA | 1 | 0 | No |
| Sep 11, 2026 | CA | 3 | 0 | No |
How these rates are calculated
Period: Oct 18, 2024 – Oct 18, 2026. Vehicle rate = vehicle inspections with a vehicle out-of-service order ÷ vehicle inspections (levels 1, 2, 5 and 6). Driver rate uses levels 1, 2, 3 and 6. The Arizona average covers 53,931 vehicle and 81,867 driver inspections of all Arizona-based carriers in this period. It mixes every type of operation, so compare with care; rates based on a handful of inspections say little. FMCSA's own SMS measures are weighted differently: SMS profile ↗ · SAFER snapshot ↗
Violations in FMCSA's SMS last 24 months
240 violations counted in FMCSA's Safety Measurement System (SMS), 52 of them serious enough to put the driver or vehicle out of service.
Why is this different from the 330 violations above?
The inspections section's number counts every violation written on the inspection reports in our Oct 18, 2024 – Oct 18, 2026 window. The SMS count comes from FMCSA's own monthly SMS snapshot, which uses its own 24-month window and only the violations it scores. Both are FMCSA figures; they measure different things.
| Category (FMCSA BASIC) | Violations | Out of service | Share | Arizona share |
|---|---|---|---|---|
| Vehicle Maintenance | 145 | 44 | 60.4% | 75.7% |
| Hours-of-Service Compliance | 48 | 3 | 20.0% | 12.1% |
| Unsafe Driving | 42 | 0 | 17.5% | 8.1% |
| Driver Fitness | 5 | 5 | 2.1% | 3.5% |
10 most frequent violations
| Violation | Times | Out of service |
|---|---|---|
| Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS Tires · Vehicle Maintenance · code 39375A3TAOL | 14 | 14 |
| State/Local Laws - Lane restriction violation Misc Violations · Unsafe Driving · code 3922SLLLR | 14 | 0 |
| Air Brake - Audible air leak at a proper connection Brakes All Others · Vehicle Maintenance · code 39345DB | 12 | 0 |
| Air Brake - Hose/tubing damaged or not secured Brakes All Others · Vehicle Maintenance · code 39345B2BAIR | 11 | 2 |
| HOS (ELD) - On request by an authorized safety official a driver must produce and transfer from an ELD the driver's hours of service records in accordance with t Fail to transfer ELD records · Hours-of-Service Compliance · code 39524DELDPT | 8 | 0 |
| Conspicuity Systems - Truck tractor lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1 1997 Reflective Sheeting · Vehicle Maintenance · code 39311A1CSLRR | 8 | 0 |
| Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 Brakes All Others · Vehicle Maintenance · code 39355EB | 7 | 0 |
| HOS (Property) - Driving more than 11 hours following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Time Hours · Hours-of-Service Compliance · code 3953A1HOSPD | 6 | 1 |
| State/Local Laws - Speeding 6-10 miles per hour over the speed limit Speeding 2 · Unsafe Driving · code 3922SLLS2 | 6 | 0 |
| HOS (ELD) - ELD Form and Manner Other Log/Form & Manner · Hours-of-Service Compliance · code 39524 | 5 | 0 |
Source: FMCSA SMS violation file, inspections in the last 24 months, published Oct 18, 2026. "Share" is this company's mix of violations; the Arizona column is the mix across all Arizona-based carriers, so you can see which kinds of problems stand out. A high count partly reflects fleet size and how often trucks are inspected.
Crashes Oct 18, 2024 – Oct 18, 2026
10 most recent crashes
| Date | Location | Fatalities | Injuries |
|---|---|---|---|
| Jul 16, 2026 | Goodyear, AZ | 0 | 0 |
| May 27, 2026 | Phoenix, AZ | 0 | 0 |
| Apr 29, 2026 | Tolleson, AZ | 0 | 0 |
| Jan 31, 2026 | Unincorporated, CA | 0 | 1 |
| Nov 12, 2025 | Tonopah, AZ | 0 | 0 |
| Oct 9, 2025 | Goodyear, AZ | 0 | 0 |
| Oct 9, 2025 | Anaheim, CA | 0 | 1 |
| Oct 1, 2025 | Rural (Monroe County), AR | 0 | 0 |
| Aug 23, 2025 | Unknown, AZ | 0 | 1 |
| Apr 9, 2025 | Cerritos, CA | 0 | 0 |
Reportable crashes do not imply the carrier was at fault.
Company details FMCSA census · Oct 18, 2026
| USDOT number | 44035 |
|---|---|
| MC / docket | MC144606 |
| Legal name | DUNCAN & SON LINES INC |
| Operation | Interstate |
| Business type | Corporation |
| Power units | 259 |
| Drivers | 231 |
| Annual mileage | 23,801,483 (2025) |
| Hazmat | Yes |
| Safety rating | Satisfactory (Oct 13, 2010) |
| USDOT number added | Jun 1, 1974 · 52 years ago |
| Last MCS-150 update | Feb 10, 2026 |
Cargo carried
General FreightMetal: Sheets, Coils, RollsBuilding MaterialsMachinery, Large ObjectsIntermodal ContainersGrain, Feed, HayMeatChemicalsRefrigerated FoodPaper ProductsConstructionOtherScrap Metal
Questions about DUNCAN & SON LINES INC
What does DUNCAN & SON LINES INC's operating authority allow?
MC144606: Common carrier (may haul regulated property for hire for the general public); Contract carrier (may haul regulated property for hire under continuing contracts with specific shippers).
Which information about DUNCAN & SON LINES INC is old or missing?
Operating authority is the last known status from the FMCSA snapshot of May 14, 2026, not a current check. Insurance filings are from the same May 14, 2026 snapshot.
What should I verify before booking DUNCAN & SON LINES INC?
Confirm the authority and insurance on the Motus record for USDOT 44035. Call the company back on the phone number on file, (623) 386-4511, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC144606, and ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Other companies using (623) 386-4511
A shared number is common for related companies, dispatch services and family businesses. It is not proof of fraud, but it is worth knowing which company you are dealing with.
4 companies
| Company | Location | USDOT | Docket | Trucks | Authority |
|---|---|---|---|---|---|
| COMPLETE 380 LLC Carrier |
Memphis, TN | 4184471 | MC1611611 | 25 | Active Last known · May 14, 2026 |
| DSL TANKER LLC Carrier |
Buckeye, AZ | 4125375 | MC1578598 | 18 | Active Last known · May 14, 2026 |
| 4 GEN LOGISTICS LLC Carrier |
Buckeye, AZ | 1582145 | MC585840 | 1 | Not authorized Last known · May 14, 2026 |
| DSL LOGISTICS LLC Broker · DBA DSL LOGISTICS |
Buckeye, AZ | 2229816 | MC441494 | — | Active Last known · May 14, 2026 |
Other trucking companies in Buckeye, AZ →
Company details from the FMCSA Company Census File (Oct 18, 2026). Inspections and crashes from FMCSA MCMIS files. About our data · Report an error on this page (how corrections work).
Page generated 2026-10-19 11:35 UTC.