Carrier profile · USDOT 44035 · MC-144606 · Updated Aug 20, 2026

Duncan & Son Lines Inc

259 power unitsavg 4.7 yrNational · 21 statesBUCKEYE, AZ88/100

CARRIER ACTIVEMC-144606 ACTIVERATED SATISFACTORYHAZMAT

Observed fleet · trailing 24 mo daily

259Power units

219 observed · MCS-150

379Trailers seen

Decoded · vPIC

4.7Avg age (yr)

1997–2026 · vPIC

Call dispatch(623) 386-4511 Email dispatchjulie@duncantruckingltd.com

Click to see how we scored it

Load decision · FMCSA snapshot · Aug 20, 2026

Clear to load

Clear under the current scoring — review the flagged signal below before loading.

Watch · 1

Fatal crash on record6 crash(es) involving a fatality are on this carrier's record.

In good standing · 4

Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 52 yearsOperating authority has been on file since 1974.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 629 inspections.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo13.0%

▼ 22.26% nat'l

Crashes · fatal

14 in 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo13.0%

▼ 22.26% nat'l

Crashes · fatal

14 in 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Small fleet

259 power units. Brokers price each fleet type apart.

Fleet age vs peersNewer

4.7 yr

Model years 1997–2026 · peer benchmark unavailable.

Identity stabilityStable

52 yr unchanged

Same registration since 1974 — no chameleon / reincarnation signal.

Safety

420 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 13.0%24-mo cumulative

050%nat'l 22.26%

Driver OOS 1.2%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 330 vehicle and 419 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

14.0% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 5.5 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

406 inspections in the charted months · busiest month Jul '26 · 36

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Well-monitored

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.8 / unit·yr

thin signalabundant signal

Within the expected band for a 259-unit fleet — FMCSA has inspected this carrier often enough that the out-of-service and violation signals above are statistically trustworthy.

Registered power units: 259
Inspections · 24 mo: 420
Annualized: ≈210 / yr
Coverage: ≈0.8 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving120 · 0 OOS
393.45 Brake tubing / hose defectsVehicle Maintenance40 · 14 OOS
395.24 ELD — record edits / dataHOS Compliance27 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance24 · 8 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance22 · 19 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance17 · 2 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance16 · 2 OOS
395.8 Record of duty status (log / ELD) not current or missingHOS Compliance15 · 2 OOS
395.3 Driving beyond hours-of-service limitsHOS Compliance13 · 2 OOS
395.22 ELD — provider/registration/malfunctionHOS Compliance8 · 0 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & Insurance

Can they legally + adequately haul your load?

Operating authority· 49 CFR · per type

Operating authority

Common: Active
Contract: Active
Broker: Inactive

Insurance & bonds

BIPD / liability$1,000,000 in force

Cargo filing (census)Not recorded per census

Surety bond (census)Not recorded per census

Insurance adequacy· filed BIPD vs the $750K federal floor

$1M in forcegeneral-freight federal minimum

$750K floor

Filed BIPD coverage of $1M meets or exceeds the $750K federal minimum for general freight (49 CFR 387.9). Some commodities (hazmat, larger vehicles) require $1M–$5M — confirm against your load.

Insurance continuity· insurer · policy · lapses

$750K BIPD last filed ’21 · 4 insurers · 1 lapseCoverage lapse

Great West’90–’95

Wilshire’95–’03

National Interstate’11–now

1990199920082017now

Shorter eras are too brief to label at this scale — all 5 insurers are named in the list below.

BIPD in force — $1,000,000 · NATIONAL INTERSTATE INSURANCE COMPANY · since Sep 2021

All 5 insurer eras · dates, limits, renewals

Insurer	Period	Limit	Renewals
NATIONAL INTERSTATE INSURANCE COMPANY	Jan 2011 → Sep 2021	$750K	5
NATIONAL INTERSTATE INSURANCE COMPANY	Sep 2006 → Sep 2006	$750K	2
CANAL INSURANCE CO.	Sep 2003 → Sep 2006	$750K	7
WILSHIRE INSURANCE COMPANY	Sep 1995 → Sep 2003	$750K	2
GREAT WEST CASUALTY CO.	Sep 1990 → Sep 1995	$750K	1

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 259
Observed power (24 mo): 219
Trailers (towed): 379

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Fleet age· model years · decoded VINs

4.7 yr

Average age

2026

Newest model yr

1997

Oldest model yr

35.5%

VINs decoded

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & Lanes

Revealed by inspection density across 21 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusNational

revealed

States observed

US states

Inspections · 24 mo

418

CA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

BUCKEYE, AZ

23860 W US HWY 85

Top corridor

CA ⇄ AZ

CA 237 · AZ 71 · NM 32

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & Fraud

Affiliated entities & reincarnation signals · for review, not a verdict

Last 12 months: 60 trucks also ran under 32 other carriers

VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 711125 USDOT 1836332 USDOT 3187957 USDOT 2262307 USDOT 3361069 USDOT 3067898 USDOT 3466597 USDOT 4108021Some overlap is legitimate (leased or sold equipment); review alongside the other signals.

Show all-time history (99 trucks · 70 carriers)

Across all inspections on record: USDOT 692175 USDOT 1969810 USDOT 2564880 USDOT 2877273 USDOT 3187957 USDOT 1836332 USDOT 2262307 USDOT 2877250

Shares a registration email domain with other carriers

@duncantruckingltd.com — 4 carriers: USDOT 2981198 USDOT 4125375 USDOT 4184471

Shares a company officer with other carriers

julie smith — 17 carriers: USDOT 596306 USDOT 1046583 USDOT 1049348 USDOT 1150945 USDOT 1192045 USDOT 1466249 USDOT 1530547 USDOT 2206527

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

259

Observed (24 mo)

219

Shared w/ other carriers

100

Registered and roadside-observed capacity are broadly consistent.

Explore the carrier network & VIN cross-links

Identity & Federal

FMCSA census + L&I dossier

Location

Physical address: 23860 W US HWY 85, BUCKEYE, AZ, 85326
Operation: Interstate· Hazmat

Contact

Phone: (623) 386-4511
Fax: (623) 386-8734
Email: julie@duncantruckingltd.com
Web domain: duncantruckingltd.com

Registration

Officers: David Duncan · Julie Smith
USDOT / docket: 44035 · MC-144606
First registered: Jun 1, 1974
Last MCS-150: Feb 10, 2026 · 23,801,483 mi (2025)
FMCSA safety rating: Satisfactory · Oct 13, 2010
D-U-N-S: 21652607

Fleet (self-reported · MCS-150)

259

Power units

231

Drivers

231

CDL drivers

23,801,483

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

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Verification summaryAuthority, insurance, safety and identity facts for DUNCAN & SON LINES INC.

DUNCAN & SON LINES INC (USDOT 44035) has a Vektor safety score of 88/100 and a Clear to load verdict, from the carrier's FMCSA record refreshed Aug 20, 2026.

The carrier holds active common and contract for-hire operating authority per FMCSA L&I as of Aug 20, 2026.

It has an active BIPD insurance filing with a $1,000,000 limit in force from NATIONAL INTERSTATE INSURANCE COMPANY effective Sep 15, 2021 in FMCSA L&I's current snapshot as of Aug 20, 2026.

Its vehicle out-of-service rate was 13.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier received 420 roadside inspections in the last 24 months — 330 vehicle-level and 419 driver-level — across 21 states, according to FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier has 14 reportable crashes in the last 24 months and 6 fatal crashes across the full FMCSA crash record available as of Aug 20, 2026.

It reports 259 power units and 231 drivers in its most recent MCS-150 filing dated Feb 10, 2026.

It has an FMCSA safety rating of Satisfactory assigned Oct 13, 2010 in the federal record refreshed Aug 20, 2026.

Frequently asked

What is DUNCAN & SON LINES INC's USDOT number?

DUNCAN & SON LINES INC's USDOT number is 44035, and its motor carrier number is MC-144606.

Is DUNCAN & SON LINES INC authorized to operate?

As of Aug 20, 2026, DUNCAN & SON LINES INC is active in the FMCSA register with common, contract, broker operating authority on file.

What is DUNCAN & SON LINES INC's safety record?

DUNCAN & SON LINES INC has a 13.0% vehicle out-of-service rate (national average 22.26%) across 629 roadside inspections, with 14 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 88/100 (tier: clear).