Fleet typeIdentity
Asset-based
259 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 44035 · MC-144606
DUNCAN & SON LINES INC
259 power unitsavg 4.8 yrNational · 20 statesBUCKEYE, AZ
CARRIER ACTIVEMC-144606 ACTIVERATED SATISFACTORYHAZMAT
Observed fleet · trailing 24 mo daily
259Power units
210 observed · MCS-150
365Trailers seen
Decoded · vPIC
4.8Avg age (yr)
1997–2026 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-13
Clear to load
Active authority and a clean federal record. No blocking issues found.
Active operating authorityInsurance on fileFatal crash on 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 599 inspections.
Operating authority5252 yr active
since 1974Insurance (BIPD)On file
FMCSA L&IVehicle OOS · 24mo12.912.9 %
▼ 22.26% nat'lCrashes · fatal66
14 in 24moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersNewer
4.8 yr
Model years 1997–2026 · peer benchmark computing.
Identity stabilityStable
52 yr unchanged
Same registration since 1974 — no chameleon / reincarnation signal.
AI readFull read
Is DUNCAN & SON LINES INC safe to work with?
Is DUNCAN & SON LINES INC safe to load? DUNCAN & SON LINES INC (USDOT 44035, MC-144606) is an active asset-based motor carrier based in BUCKEYE, AZ, operating 259 power units and 231 drivers. Operating authority has been active 52 years (past the 24-month broker-confidence threshold). Across 599 roadside inspections, its vehicle out-of-service rate is 12.8% (below the 22.26% national average), with 14 reportable crashes in the last 24 months. FMCSA rates it Satisfactory. Vektor rates it clear to load (88/100), with the leading concern: fatal crash on record. Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.
FMCSA fields + Vektor analysis · updated 2026-06-13
D&DUNCAN & SON LINES INC 88
01
Safety
599 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 12.8% (24-mo)319 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 1.2% (24-mo)408 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
12.8% now▲ Worsening
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.
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.8 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 259-unit fleet — enough signal to read the safety record, though not a heavy sample.
- Registered power units
- 259
- Inspections · 24 mo
- 409
- Annualized
- ≈205 / 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
- 393.45 Brake tubing / hose defectsVehicle Maintenance40 · 14 OOS
- 395.24 ELD — record edits / dataHOS Compliance27
- 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
02
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 (required)Filed with FMCSA
CargoNone
Surety bond (BMC-84)None
Insurance continuity· insurer · policy · lapses
$750k BIPD · 4 insurers · 1 lapseCoverage lapse
+1 earlier
Great West · 90–95
Wilshire · 95–03
Canal · 03–06
National Interstate · 11–21
19902021
No BIPD policy is currently in force in the filing history. The authority record may still list one on file — request a COI to confirm current coverage.
5 insurer eras · collapsed from 17 filings
| 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 |
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 259
- Observed power (24 mo)
- 210
- Trailers (towed)
- 365
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
1997
Oldest model yr
VINs decoded
04
Operations & lanes
Revealed by inspection density across 20 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusNational
revealedStates observed1919
US statesInspections · 24 mo407407
CA busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
BUCKEYE, AZ
Top corridor
CA ⇄ AZ
Density
fewermore
05
Network & fraud
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 51 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 3067898USDOT 3466597USDOT 3932274USDOT 4108021USDOT 711125USDOT 1836332USDOT 3187957USDOT 2262307Some overlap is legitimate (leased or sold equipment); review alongside the other signals.
Show all-time history (100 trucks · 68 carriers)
Across all inspections on record: USDOT 2398261USDOT 2519126USDOT 3059468USDOT 3589205USDOT 3932274USDOT 692175USDOT 1969810USDOT 2564880
Shares a registration email domain with other carriers
@duncantruckingltd.com — 4 carriers: USDOT 2981198USDOT 4125375USDOT 4184471
Shares a company officer with other carriers
julie smith — 17 carriers: USDOT 596306USDOT 1046583USDOT 1049348USDOT 1150945USDOT 1192045USDOT 1466249USDOT 1530547USDOT 2206527
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)259259
Observed (24 mo)210210
Shared w/ other carriers100100
Registered and roadside-observed capacity are broadly consistent.
06
Identity & contact
FMCSA census + L&I dossier
Location
- Physical address
- 23860 W US HWY 85, BUCKEYE, AZ, 85326
- Operation
- Interstate· Hazmat
Contact
- Phone
- (623) 386-4511
- Cell
- (602) 329-0799
- Fax
- (623) 386-8734
- Web domain
- duncantruckingltd.com
Registration
- Officers
- Julie Smith · David Duncan
- USDOT / docket
- 44035 · MC-144606
- First registered
- 06/01/1974
- Last MCS-150
- 02/10/2026 · 23,801,483 mi (2025)
- FMCSA safety rating
- Satisfactory · 10/13/2010
- D-U-N-S
- 21652607
Fleet (self-reported · MCS-150)
07
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.
08
Reviews
Verified broker, shipper & driver reviews — moderated
Performance ratings only — never the Vektor risk score
No verified reviews yet
Be the first broker or shipper to rate DUNCAN & SON LINES INC. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.
Leave a review09
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 2026-06-13, 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 12.8% vehicle out-of-service rate (national average 22.26%) across 599 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).
How big is DUNCAN & SON LINES INC's fleet?
DUNCAN & SON LINES INC operates 259 power units and 231 drivers per its most recent MCS-150 filing.
Where is DUNCAN & SON LINES INC based?
DUNCAN & SON LINES INC is based in BUCKEYE, AZ, with roadside inspections recorded across 20 states.