Carrier profile · USDOT 637791 · MC-384420 · Updated Aug 20, 2026

Rex Lee Siemer Trucking LLC

17 power unitsavg 18.5 yrRegional · 5 statesMERCER, MO76/100

CARRIER ACTIVEMC-384420 ACTIVERATED SATISFACTORY

Observed fleet · trailing 24 mo daily

17Power units

9 observed · MCS-150

9Trailers seen

Decoded · vPIC

18.5Avg age (yr)

2000–2023 · vPIC

Call dispatch(660) 382-4665 Email dispatchrsiemer@grm.net

Click to see how we scored it

Load decision · FMCSA snapshot · Aug 20, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Watch · 2

Driver out-of-service rate well above average21.4% of driver inspections were placed out of service vs the 6.7% national average.Fatal crash on record1 crash(es) involving a fatality are on this carrier's record.

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 30 yearsOperating authority has been on file since 1996.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo20.0%

▼ 22.26% nat'l

Crashes · fatal

2 in 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo20.0%

▼ 22.26% nat'l

Crashes · fatal

2 in 24 mo

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

Fleet typeIdentity

Asset-based

17 power units. Brokers price each fleet type apart.

Fleet age vs peersOlder

18.5 yr

Model years 2000–2023 · peer benchmark unavailable.

Identity stabilityStable

30 yr unchanged

Same registration since 1996 — no chameleon / reincarnation signal.

Safety

14 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 20.0%24-mo cumulative

050%nat'l 22.26%

Driver OOS 21.4%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 5 vehicle and 14 driver inspections over 24 months.

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

20.0% · latest 6-mo window

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. More resolved windows are needed to establish a trend. 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

14 inspections in the charted months · busiest month Nov '25 · 3

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.

Expected band

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.4 / unit·yr

thin signalabundant signal

Roadside-inspection volume is about what you'd expect for a 17-unit fleet — enough signal to read the safety record, though not a heavy sample.

Registered power units: 17
Inspections · 24 mo: 14
Annualized: ≈7 / yr
Coverage: ≈0.4 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 Driving15 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance5 · 1 OOS
393.45 Brake tubing / hose defectsVehicle Maintenance2 · 1 OOS
395.8 Record of duty status (log / ELD) not current or missingHOS Compliance2 · 1 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance2 · 0 OOS
393.55 Antilock brake system (ABS)Vehicle Maintenance2 · 0 OOS
383.23 Operating without a valid CDLDriver Fitness2 · 2 OOS
393.60 Windshield / glazingVehicle Maintenance1 · 0 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance1 · 1 OOS
393.78 Windshield wipersVehicle 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$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 ’23 · 5 insurers · 0 lapsesInsurer churn

Great West’00–’04

Continental Western’05–’08

Maxum’08–’13

National’13–’23

2000200720142021now

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 · GREAT WEST CASUALTY CO. · since Jun 2023

All 5 insurer eras · dates, limits, renewals

Insurer	Period	Limit	Renewals
NATIONAL CASUALTY COMPANY	May 2013 → Jun 2023	$750K	2
MAXUM CASUALTY INSURANCE COMPANY	May 2008 → Jun 2013	$750K	2
CONTINENTAL WESTERN INSURANCE CO.	May 2005 → May 2008	$750K	3
OAK RIVER INSURANCE COMPANY	May 2004 → May 2005	$750K	1
GREAT WEST CASUALTY CO.	May 2000 → May 2004	$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): 17
Observed power (24 mo): 9
Trailers (towed): 9

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

Fleet age· model years · decoded VINs

18.5 yr

Average age

2023

Newest model yr

2000

Oldest model yr

22.2%

VINs decoded

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

Operations & Lanes

Revealed by inspection density across 5 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional

revealed

States observed

US states

Inspections · 24 mo

IA busiest

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

Home base

MERCER, MO

14603 US HWY 65

Top corridor

IA ⇄ MO

IA 5 · MO 3 · WI 3

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

No shared-VIN flow in the last 12 months

None of this carrier's trucks were inspected under another USDOT in the last 12 months — any shared equipment is historical, not active.

Show all-time history (1 truck · 1 carriers)

Across all inspections on record: USDOT 2869442

Shares a registration email domain with other carriers

@grm.net — 238 carriers: USDOT 73470 USDOT 88993 USDOT 89333 USDOT 98093 USDOT 98179 USDOT 175586 USDOT 177031 USDOT 208720

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: 14603 US HWY 65, MERCER, MO, 64661-9705
Operation: Interstate

Contact

Phone: (660) 382-4665
Fax: (660) 382-5411
Email: rsiemer@grm.net
Web domain: grm.net

Registration

Officer: Dona Siemer
USDOT / docket: 637791 · MC-384420
First registered: Apr 19, 1996
Last MCS-150: Feb 18, 2026 · 879,684 mi (2024)
FMCSA safety rating: Satisfactory · Mar 2, 2004
D-U-N-S: 792607736

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

879,684

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 REX LEE SIEMER TRUCKING LLC.

REX LEE SIEMER TRUCKING LLC (USDOT 637791) has a Vektor safety score of 76/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Aug 20, 2026.

The carrier holds active common 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 GREAT WEST CASUALTY CO. effective Jun 1, 2023 in FMCSA L&I's current snapshot as of Aug 20, 2026.

Its vehicle out-of-service rate was 20.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier received 14 roadside inspections in the last 24 months — 5 vehicle-level and 14 driver-level — across 5 states, according to FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier has 2 reportable crashes in the last 24 months and 1 fatal crash across the full FMCSA crash record available as of Aug 20, 2026.

It reports 17 power units and 9 drivers in its most recent MCS-150 filing dated Feb 18, 2026.

It has an FMCSA safety rating of Satisfactory assigned Mar 2, 2004 in the federal record refreshed Aug 20, 2026.

Frequently asked

What is REX LEE SIEMER TRUCKING LLC's USDOT number?

REX LEE SIEMER TRUCKING LLC's USDOT number is 637791, and its motor carrier number is MC-384420.

Is REX LEE SIEMER TRUCKING LLC authorized to operate?

As of Aug 20, 2026, REX LEE SIEMER TRUCKING LLC is active in the FMCSA register with common, contract, broker operating authority on file.

What is REX LEE SIEMER TRUCKING LLC's safety record?

REX LEE SIEMER TRUCKING LLC has a 20.0% vehicle out-of-service rate (national average 22.26%) across 21 roadside inspections, with 2 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 76/100 (tier: review).

How big is REX LEE SIEMER TRUCKING LLC's fleet?

REX LEE SIEMER TRUCKING LLC operates 17 power units and 9 drivers per its most recent MCS-150 filing.

Where is REX LEE SIEMER TRUCKING LLC based?

REX LEE SIEMER TRUCKING LLC is based in MERCER, MO, with roadside inspections recorded across 5 states.

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