FMCSA Carrier Profile
MS & SONS CORP
Owner / Officer: Teri Dunphy
Active
Satisfactory
Authority Active
Active 41 yrs
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
Phone
Email
Owner / Officer
Teri Dunphy
Operating Authority
MC143871
Common Carrier
Insurance on File
STARSTONE SPECIALTY INSURANCE COMPANY
1 · $2,000,000 · Policy AXS00516622P-04
GREAT WEST CASUALTY CO.
1 · $1,000,000 · Policy MCP74021A
CRUM & FORSTER SPECIALTY INSURANCE COMPANY
1 · $2,000,000 · Policy SEO-109833
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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
2025
2024
Inspection Records (41)
| Date | State | Level | Vehicle | Viol. | 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
| Date | Status | Type |
|---|---|---|
| November 10, 2011 | INVOLUNTARY REVOCATION | Common |
| November 12, 2020 | INVOLUNTARY REVOCATION | Common |
| October 3, 2018 | INVOLUNTARY REVOCATION | Common |
| July 8, 1985 | GRANTED | Common Carrier |
| May 29, 1981 | GRANTED | Common Carrier |
| February 26, 1979 | GRANTED | Common Carrier |
Insurance & Revocation Filings
| Date | Type | Status |
|---|---|---|
| BI&PD Primary/Excess | Cancellation Pending | |
| BI&PD Primary/Excess | Cancellation Pending | |
| BI&PD Primary/Excess | Cancellation Pending |
Other Carriers in Humboldt, IA
Data sourced from FMCSA MCMIS via Socrata. Last updated: July 28, 2026.
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