REX LEE SIEMER TRUCKING LLC
AUTHORIZEDUSDOT
637791
MC Number
384420
Fleet Size
17
Total Drivers
9
FMCSA-derived snapshot updated: July 26, 2026. This is not a real-time record; verify critical authority, insurance and safety details directly with FMCSA.
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Safety overview
REX LEE SIEMER TRUCKING LLC is a small interstate motor carrier based in MERCER, Missouri, operating 17 power units with 9 drivers. CarrierOwl is currently validating BASIC percentile display against the official FMCSA SMS portal; use the inspection, out-of-service, crash, authority, and insurance data below as the primary public safety indicators on this page. Their driver out-of-service rate of 14.3% runs above the national average of 5.51%. They have 2 crashes on file (1 with injuries). FMCSA records show 14 inspections for this carrier.
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BASIC scores
Under reviewCarrierOwl is validating BASIC percentile calculations against the official FMCSA SMS portal. Until that review is complete, use FMCSA directly for current BASIC percentiles and use the inspection, out-of-service, crash, authority, and insurance data on this page as supporting indicators.
BASIC percentile display is temporarily paused while we validate CarrierOwl's methodology against the official FMCSA SMS portal.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Missouri is 12.3% and the average vehicle OOS rate is 30.1% across 25,330 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire
- Cargo Carried
- N
- Hazmat
- No
- Safety Rating Date
- N/A
Inspections
14
Total
74%
Driver %
Insurance on file
Liability (BIPD)
GREAT WEST CASUALTY CO. — eff. Jun 1, 2023
Cargo
Not on file
Surety Bond
Not on file
Trust Fund
Not on file
Source: Legacy FMCSA. Verify current filings directly with FMCSA before relying on them.
Crash history
2
Total Crashes
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Frequently asked questions
Is REX LEE SIEMER TRUCKING LLC authorized to operate?
CarrierOwl's FMCSA-derived snapshot for REX LEE SIEMER TRUCKING LLC (USDOT #637791) shows "AUTHORIZED" status. The snapshot lists them as an interstate carrier. Verify the current official record with FMCSA before booking a load.
What is REX LEE SIEMER TRUCKING LLC's safety record?
REX LEE SIEMER TRUCKING LLC has 14 inspections on file and 2 crashes on record. They do not show a formal FMCSA safety rating in CarrierOwl's current data. CarrierOwl is validating BASIC percentile display against the official FMCSA SMS portal, so brokers should verify current BASIC percentiles directly with FMCSA before relying on them.
How many trucks does REX LEE SIEMER TRUCKING LLC operate?
REX LEE SIEMER TRUCKING LLC operates 17 power units with 9 drivers on file. That makes them a small carrier.
Does REX LEE SIEMER TRUCKING LLC transport hazardous materials?
No. REX LEE SIEMER TRUCKING LLC does not have a hazardous materials flag in the FMCSA database.
Where is REX LEE SIEMER TRUCKING LLC located?
REX LEE SIEMER TRUCKING LLC is based in MERCER, Missouri at 14603 US HWY 65, 64661-9705. Phone: (660) 382-4665.
What are REX LEE SIEMER TRUCKING LLC's out-of-service rates?
REX LEE SIEMER TRUCKING LLC's driver out-of-service rate is 14.3%, compared to the national average of 5.51%. Higher than average, which could point to driver compliance issues. Their vehicle out-of-service rate is 40.0% (national average: 20.72%). Above average, which may point to vehicle maintenance gaps.