Carrier profile · USDOT 3279280 · MC-1036575 · Updated Jul 18, 2026

Spencer Trucking LLC

DBA STONE TRUCKING

48 power unitsavg 3.7 yrRegional · 4 statesTUCSON, AZ93/100

CARRIER ACTIVEMC-1036575 ACTIVEHAZMAT

Observed fleet · trailing 24 mo daily

48Power units

13 observed · MCS-150

13Trailers seen

Decoded · vPIC

3.7Avg age (yr)

1997–2026 · vPIC

Call dispatch(520) 219-0498 Email dispatchmheberling@spencertrucks.com

Click to see how we scored it

Load decision · FMCSA snapshot · Jul 18, 2026

Clear to load

Active authority and a clean federal record. No blocking issues found.

Watch · 1

Vehicle out-of-service rate above average30.8% vs the 22.26% national average.

In good standing · 3

Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 7 yearsOperating authority has been on file since 2019.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$750K in force

FMCSA L&I

Vehicle OOS · 24-mo30.8%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$750K in force

FMCSA L&I

Vehicle OOS · 24-mo30.8%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

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

Fleet typeIdentity

Asset-based

48 power units. Brokers price each fleet type apart.

Fleet age vs peersNewer

3.7 yr

Model years 1997–2026 · peer benchmark unavailable.

Identity stabilityStable

7 yr unchanged

Same registration since 2019 — no chameleon / reincarnation signal.

Safety

16 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 30.8%24-mo cumulative

050%nat'l 22.26%

Driver OOS 6.3%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 13 vehicle and 16 driver inspections over 24 months.

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

30.8% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 2.6 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

15 inspections in the charted months · busiest month Jul '26 · 10

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.

Thin coverage

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.2 / unit·yr

thin signalabundant signal

Few roadside inspections for a 48-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.

Registered power units: 48
Inspections · 24 mo: 16
Annualized: ≈8 / yr
Coverage: ≈0.2 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 Driving2 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance2 · 1 OOS
393.43 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS
383.23 Operating without a valid CDLDriver Fitness1 · 1 OOS
393.53 Automatic brake adjusters / indicatorsVehicle Maintenance1 · 0 OOS
393.60 Windshield / glazingVehicle Maintenance1 · 0 OOS
393.78 Windshield wipersVehicle Maintenance1 · 0 OOS
393.47 Brake actuators / linings / componentsVehicle Maintenance1 · 0 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance1 · 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: None
Broker: None

Insurance & bonds

BIPD / liability$750,000 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

$750K in forcegeneral-freight federal minimum

$750K floor

Filed BIPD coverage of $750K 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 ’23 · 2 insurers · 0 lapsesContinuous

United Financial’20–’23

Acuity A’23–’25

2020202220242026now

Shorter eras are too brief to label at this scale — all 3 insurers are named in the list below.

BIPD in force — $750,000 · ACUITY, A MUTUAL INSURANCE COMPANY · since Oct 2025

All 3 insurer eras · dates, limits, renewals

Insurer	Period	Limit	Renewals
UNITED FINANCIAL CASUALTY COMPANY	Feb 2023 → Jan 2023	$750K	2
ACUITY, A MUTUAL INSURANCE COMPANY	Jan 2023 → Dec 2025	$750K	2
UNITED FINANCIAL CASUALTY COMPANY	Feb 2020 → Jan 2023	$750K	3

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 48
Observed power (24 mo): 13
Trailers (towed): 13

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

Fleet age· model years · decoded VINs

3.7 yr

Average age

2026

Newest model yr

1997

Oldest model yr

7.7%

VINs decoded

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

Operations & Lanes

Revealed by inspection density across 4 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional

revealed

States observed

US states

Inspections · 24 mo

TX busiest

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

Home base

TUCSON, AZ

5330 N LA CHOLLA BLVD

Top corridor

TX ⇄ AZ

TX 11 · AZ 3 · CA 1

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: 3 trucks also ran under 1 other carrier

VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 3268710Some overlap is legitimate (leased or sold equipment); review alongside the other signals.

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Shared w/ other carriers

Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.

Explore the carrier network & VIN cross-links

Identity & Federal

FMCSA census + L&I dossier

Location

Physical address: 5330 N LA CHOLLA BLVD, TUCSON, AZ, 85741
Operation: Interstate· Hazmat

Contact

Phone: (520) 219-0498
Email: mheberling@spencertrucks.com
Web domain: spencertrucks.com

Registration

Officer: Patrick Spencer
USDOT / docket: 3279280 · MC-1036575
First registered: Apr 26, 2019
Last MCS-150: Feb 3, 2026 · 426,646 mi (2025)
FMCSA safety rating: Not rated
Recordable crash rate: 0.00
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

426,646

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 SPENCER TRUCKING LLC.

SPENCER TRUCKING LLC (USDOT 3279280) has a Vektor safety score of 93/100 and a Clear to load verdict, from the carrier's FMCSA record refreshed Jul 18, 2026.

The carrier holds active common for-hire operating authority per FMCSA L&I as of Jul 18, 2026.

It has an active BIPD insurance filing with a $750,000 limit in force from ACUITY, A MUTUAL INSURANCE COMPANY effective Oct 2, 2025 in FMCSA L&I's current snapshot as of Jul 18, 2026.

Its vehicle out-of-service rate was 30.8% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jul 18, 2026.

The carrier received 16 roadside inspections in the last 24 months — 13 vehicle-level and 16 driver-level — across 4 states, according to FMCSA roadside-inspection data refreshed Jul 18, 2026.

The carrier has 0 reportable crashes in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Jul 18, 2026.

It reports 48 power units and 24 drivers in its most recent MCS-150 filing dated Feb 3, 2026.

It has no FMCSA-assigned safety rating in the federal record refreshed Jul 18, 2026.

Frequently asked

What is SPENCER TRUCKING LLC's USDOT number?

SPENCER TRUCKING LLC's USDOT number is 3279280, and its motor carrier number is MC-1036575.

Is SPENCER TRUCKING LLC authorized to operate?

As of Jul 18, 2026, SPENCER TRUCKING LLC is active in the FMCSA register with common, contract, broker operating authority on file.

What is SPENCER TRUCKING LLC's safety record?

SPENCER TRUCKING LLC has a 30.8% vehicle out-of-service rate (national average 22.26%) across 19 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 93/100 (tier: clear).