DUNCAN & SON LINES INC
AUTHORIZEDUSDOT
44035
MC Number
144606
Fleet Size
259
Total Drivers
231
FMCSA-derived snapshot updated: August 30, 2026. This is not a real-time record; verify critical authority, insurance and safety details directly with FMCSA.
Broker verification report
Want a verification report for this carrier?
Request your first CarrierOwl report free for DUNCAN & SON LINES INC. We will use this DOT profile to show authority, insurance, safety, contact consistency, and timestamped notes your team can save before sending a rate con.
Safety overview
DUNCAN & SON LINES INC is a large interstate motor carrier based in BUCKEYE, Arizona, operating 259 power units with 231 drivers. CarrierOwl is currently validating BASIC percentile display against the official FMCSA SMS portal; use the inspection, out-of-service, crash, authority, and insurance data below as the primary public safety indicators on this page. Their driver out-of-service rate of 1.2% comes in under the 6.7% national average. They have 15 crashes on file (4 with injuries). FMCSA records show 418 inspections for this carrier.
Truck insurance quotes
Need insurance for this carrier?
Enter your details and we'll check whether an eligible licensed insurance partner is available. Submission does not guarantee a quote or coverage.
BASIC scores
Under reviewCarrierOwl is validating BASIC percentile calculations against the official FMCSA SMS portal. Until that review is complete, use FMCSA directly for current BASIC percentiles and use the inspection, out-of-service, crash, authority, and insurance data on this page as supporting indicators.
BASIC percentile display is temporarily paused while we validate CarrierOwl's methodology against the official FMCSA SMS portal.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Arizona is 12.9% and the average vehicle OOS rate is 26.9% across 30,711 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire
- Cargo Carried
- N
- Hazmat
- Yes
- Safety Rating Date
- N/A
Inspections
418
Total
56%
Driver %
Insurance on file
Liability (BIPD)
NATIONAL INTERSTATE INSURANCE COMPANY — eff. Sep 15, 2021
Cargo
Not on file
Surety Bond
Not on file
Trust Fund
Not on file
Source: Legacy FMCSA. Verify current filings directly with FMCSA before relying on them.
Crash history
15
Total Crashes
Similar carriers in Arizona
Other carriers in the same state with a similar fleet size.
CTI INC
RWC IDEALEASE LLC
NAVAJO TRIBAL UTILITY AUTHORITY
ROADMASTER EQUIPMENT LEASING INC
METRO FIRE EQUIPMENT INC
Frequently asked questions
Is DUNCAN & SON LINES INC authorized to operate?
CarrierOwl's FMCSA-derived snapshot for DUNCAN & SON LINES INC (USDOT #44035) shows "AUTHORIZED" status. The snapshot lists them as an interstate carrier. Verify the current official record with FMCSA before booking a load.
What is DUNCAN & SON LINES INC's safety record?
DUNCAN & SON LINES INC has 418 inspections in CarrierOwl's current imported snapshot and 15 matching crashes. They do not show a formal FMCSA safety rating in CarrierOwl's current data. A zero result is limited to the dataset and snapshot window. Verify current BASIC percentiles and crash information directly with FMCSA before relying on them.
How many trucks does DUNCAN & SON LINES INC operate?
DUNCAN & SON LINES INC operates 259 power units with 231 drivers on file. That puts them in the large carrier category by FMCSA standards.
Does DUNCAN & SON LINES INC transport hazardous materials?
Yes. DUNCAN & SON LINES INC is flagged for hazardous materials transportation with FMCSA. That means additional safety requirements and more frequent inspections.
Where is DUNCAN & SON LINES INC located?
DUNCAN & SON LINES INC is based in BUCKEYE, Arizona at 23860 W US HWY 85, 85326. Phone: (623) 386-4511.
What are DUNCAN & SON LINES INC's out-of-service rates?
DUNCAN & SON LINES INC's driver out-of-service rate is 1.2%, compared with the 6.7% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record. Their vehicle out-of-service rate is 12.8%, compared with the 23.4% reference shown by FMCSA SMS when checked August 4, 2026. Interpret the difference with inspection volume and verify the current FMCSA record.