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85/100
✗ Do Not Tender
Critical risk signals. Do not dispatch until independently verified.
Duncan & Son Lines INC
DOT 44035 · MC MC144606 · Buckeye, AZ
Report generated: June 5, 2026 at 6:28 PM
✓Authorized for hire?
✓Active insurance?
✗Safety record clean?
✓No fraud flags?
✓No prior revocations?
Carrier Summary

Duncan & Son Lines INC (DOT 44035, MC MC144606) is a Arizona-based interstate carrier headquartered in Buckeye, AZ. As of June 5, 2026 at 6:28 PM, operating authority is currently active. TruckGraph has detected 4 risk signals on this carrier, including: principal operates multiple active carrier authorities; crash with fatalities or injuries on record. TruckGraph rates this carrier "Do Not Tender" based on FMCSA compliance data, inspection history, insurance status, and network connection analysis. Last synced: June 5, 2026 at 6:28 PM.

Common AuthorityContract Authority
FMCSA Public Record
Duncan & Son Lines INC
DOT Number44035
MC NumberMC144606
Street23860 W US HWY 85
City / StateBuckeye, AZ 85326
Phone6233864511
Operation typeInterstate
HazmatNot authorized
Authority age52 yr
MCS-150 filed02/10/2026
Company officerJulie Smith
Power units259
Total drivers231
Authority Status
Common (for-hire)✓ Active
Contract (for-hire)✓ Active
Broker⚠ Inactive
TruckGraph Intelligence
Risk Signals
●Principal operates multiple active carrier authorities
●Crash with fatalities or injuries on record
●Unsafe driving violation on record
●Driver qualification violation on record
✓ OFAC Sanctions: Clear
Connection Chain
COMPLETE 380 LLCShared phone
Active
DSL TANKER LLCShared phone
Active
Active
OOS rate 10.6% vs. national avg 22.26% — below average
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Power Units
259
Fleet
Drivers
231
Total
Inspections
340
On record
Crashes
21
On record
OOS Rate
10.6%
↓ Avg 22.26%
Authority Age
52 yr
Since 1974
Violation Categories — Last 24 Months
Hours of Service
339 insp (100%)· 22 viol
Unsafe Driving
339 insp (100%)· 35 viol
Driver Fitness
339 insp (100%)· 2 viol
Controlled Substances
339 insp (100%)
Vehicle Maintenance
265 insp (78%)· 80 viol
Inspection History
340 total · OOS rate 10.6%
DateStateLevelDriver OOSVehicle OOSResult
10/31/2025CAIII00Pass
10/31/2025CAIII00Pass
10/31/2025CAIII00Pass
7/31/2025CAI00Pass
7/31/2025CAI00Pass
7/31/2024CAI00Pass
1/31/2026CAIII00Pass
12/31/2025TXII00Pass
12/31/2025AZII00Pass
12/31/2025TNIII00Pass
Crash History
21 total on record
DateStateFatalitiesInjuriesTow-away
—AZ00Y
—AZ00Y
—CA00Y
—CA00Y
—AZ00Y
Insurance Status
Status
✓ Active filing on record
Insurer
NATIONAL INTERSTATE INSURANCE COMPANY
Coverage type
91X
Coverage amount
$1,000,000
Effective
9/15/2021
Location
23860 W US HWY 85, Buckeye, AZ, 85326 · Open in Maps →
23860 W US HWY 85, BUCKEYE, AZ, 85326Open in Maps →
Authority Timeline
Authority GrantedJun 1974
FMCSA issued operating authority
ActiveCurrent
Authority currently active

Source: FMCSA compliance records, inspection data, crash records, insurance filings, and TruckGraph analysis. View methodology

Important Legal Notice

Data sourced from FMCSA public records and TruckGraph independent analysis. This is not legal advice, not a guarantee of carrier safety, and not a compliance certification. Verify through official FMCSA sources before tendering. Last synced: .

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Frequently Asked Questions

Is Duncan & Son Lines INC authorized to operate?

Yes. Duncan & Son Lines INC holds Common and Contract operating authority and is currently active.

What is Duncan & Son Lines INC's safety record?

Duncan & Son Lines INC has 340 roadside inspections on record with an out-of-service rate of 10.6%. Crash history shows 21 incidents. Review the full safety profile above before making a freight decision.

How many trucks does Duncan & Son Lines INC operate?

Duncan & Son Lines INC operates 259 power units with approximately 231 drivers.

Is Duncan & Son Lines INC insured?

Duncan & Son Lines INC has active insurance coverage on file. Coverage amount and carrier details are shown in the insurance section above.

Has Duncan & Son Lines INC had any risk indicators?

Duncan & Son Lines INC has a risk score of 85/100 (Critical) with 4 active risk signals. Review the risk section above and verify independently before tendering.

What is the DOT number for Duncan & Son Lines INC?

Duncan & Son Lines INC's DOT number is 44035 and MC number is MC144606. These identifiers are assigned by the FMCSA and can be used to look up this carrier in official compliance databases.

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Truck Graph data is open and citable. For press inquiries, contact our editorial team.

APA
Truck Graph. (2026). Duncan & Son Lines INC Safety Record, DOT 44035. Retrieved from https://truckgraph.com/carriers/44035
MLA
"Duncan & Son Lines INC Safety Record, DOT 44035." Truck Graph, Jun 5, 2026, https://truckgraph.com/carriers/44035
Chicago
"Duncan & Son Lines INC Safety Record, DOT 44035." Truck Graph. Last modified June 5, 2026. https://truckgraph.com/carriers/44035