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FMCSA Carrier Profile

MS & SONS CORP

Owner / Officer: Teri Dunphy
Active Satisfactory Authority Active Active 41 yrs
40
Power Units
42
Drivers
41
Inspections
19%
Vehicle OOS
$2,000,000
Insurance
Authority
Active
Common carrier
Insurance
On File
$2,000,000 BIPD
Safety
Satisfactory
0th pct · 41 inspections on record
✓ No risk flags found on authority or insurance records
Vetting Notes

MS & SONS CORP is an active FMCSA-registered motor carrier based in Humboldt, Iowa, operating under DOT 133751. No high-severity flags were found on authority or insurance records. Across 41 FMCSA inspections on record, this carrier shows 18.8% vehicle OOS and 3.2% driver OOS. Authority and safety history are clean as of this page's last update.

FMCSA Registration
DOT Number
133751
Operating Status
Active
Safety Rating
Satisfactory
Entity Type
Corporation
MCS-150 Filed
April 3, 2026
FMCSA Registration
June 1, 1974
Authority Granted
July 8, 1985
Annual Mileage
2,427,838 mi (2024)
Contact Information
Address
1605 Sassy Lane, Humboldt, IA 50548
Owner / Officer
Teri Dunphy
Operating Authority
MC143871
Common Carrier
Active
Insurance on File
STARSTONE SPECIALTY INSURANCE COMPANY
1 · $2,000,000 · Policy AXS00516622P-04
On File
GREAT WEST CASUALTY CO.
1 · $1,000,000 · Policy MCP74021A
On File
CRUM & FORSTER SPECIALTY INSURANCE COMPANY
1 · $2,000,000 · Policy SEO-109833
On File
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Safety Percentile
0th percentile vs. peer carriers
✓ Below FMCSA alert threshold (65th pct) · lower percentile = fewer violations than peers · source: FMCSA SMS
Safety & Inspection Summary
Total Inspections
41
Driver Inspections
31
Vehicle Inspections
16
Total OOS Orders
4
Violations by Category
Vehicle Maintenance18
Unsafe Driving17
Hours of Service3
OOS Rates vs. National Average
Driver OOS Rate3.2% · national avg 5.5%
✓ Below national average
Vehicle OOS Rate18.8% · national avg 20.7%
✓ Below national average
Inspection Trend by Year
2026
5 insp · 0 OOS
2025
20 insp · 2 OOS
2024
16 insp · 2 OOS
Inspection Records (41)
DateStateLevelVehicleViol.Status
December 30, 2024 IA Level III — Driver Only PTRB · 1XP5DB9X63N805545 0 1 OOS
November 29, 2024 IA Level III — Driver Only PTRB · 1NPXD49X6KD273796 1 Passed
July 29, 2024 IA Level III — Driver Only INTL · 2HSCEAMR7YC068563 1 Passed
April 29, 2025 KS Level II — Walk-Around PTRB · 1XP5DB9X2YD487419 3 1 OOS
November 28, 2024 IA Level II — Walk-Around PTRB · 1XP5DB9X4YN523993 0 Clean
March 28, 2025 IA Level III — Driver Only PTRB · 1XPXD49X8JD462597 1 Passed
July 28, 2025 IL Level III — Driver Only PTRB · 1NPXGGGG80D390031 1 Passed
March 27, 2026 SD Level III — Driver Only KENWORTH · 1XKWD49X23J386798 0 Clean
June 27, 2024 IA Level III — Driver Only PTRB · 1XPXDP9X6FD283063 0 Clean
September 26, 2025 IA Level III — Driver Only INTL · 2HSCEAMR7YC068563 1 Passed
January 26, 2025 IA Level II — Walk-Around PTRB · 1NPXGGGG80D390031 1 Passed
August 26, 2025 IA Level I — Full PETERBILT · 1XPXD49X3PD880476 0 Clean
Showing 12 of 41 inspection records
Authority History
DateStatusType
November 10, 2011INVOLUNTARY REVOCATIONCommon
November 12, 2020INVOLUNTARY REVOCATIONCommon
October 3, 2018INVOLUNTARY REVOCATIONCommon
July 8, 1985GRANTEDCommon Carrier
May 29, 1981GRANTEDCommon Carrier
February 26, 1979GRANTEDCommon Carrier
Insurance & Revocation Filings
DateTypeStatus
BI&PD Primary/ExcessCancellation Pending
BI&PD Primary/ExcessCancellation Pending
BI&PD Primary/ExcessCancellation Pending
Other Carriers in Humboldt, IA
Data sourced from FMCSA MCMIS via Socrata. Last updated: July 28, 2026. Verify directly on FMCSA SAFER Web.

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