Fleet typeIdentity
Asset-based
40 power units. Brokers price each fleet type apart.
Carrier profile · USDOT 133751 · MC-143871
MS & SONS CORP
40 power unitsavg 11.4 yrRegional · 7 statesHUMBOLDT, IA
CARRIER ACTIVEMC-143871 ACTIVERATED SATISFACTORYHAZMAT
Observed fleet · trailing 24 mo daily
40Power units
24 observed · MCS-150
29Trailers seen
Decoded · vPIC
11.4Avg age (yr)
2000–2026 · vPIC
Click to see how we scored it
Load decision · FMCSA snapshot · 2026-06-21
Clear to load
Active authority and a clean federal record. No blocking issues found.
Active operating authorityInsurance on fileFatal crash on record
In good standing · 4
Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 52 yearsOperating authority has been on file since 1974.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 59 inspections.
Operating authority5252 yr active
since 1974Insurance (BIPD)On file
FMCSA L&IVehicle OOS · 24mo15.415.4 %
▼ 22.26% nat'lCrashes · fatal11
2 in 24moVektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots
Fleet age vs peersTypical
11.4 yr
Model years 2000–2026 · peer benchmark computing.
Identity stabilityStable
52 yr unchanged
Same registration since 1974 — no chameleon / reincarnation signal.
AI readFull read
Is MS & SONS CORP safe to work with?
Is MS & SONS CORP safe to load? MS & SONS CORP (USDOT 133751, MC-143871) is an active asset-based motor carrier based in HUMBOLDT, IA, operating 40 power units and 42 drivers. Operating authority has been active 52 years (past the 24-month broker-confidence threshold). Across 59 roadside inspections, its vehicle out-of-service rate is 15.4% (below the 22.26% national average), with 2 reportable crashes in the last 24 months. FMCSA rates it Satisfactory. Vektor rates it clear to load (88/100), with the leading concern: fatal crash on record. Source: FMCSA SAFER/MCMIS, last updated 2026-06-21.
FMCSA fields + Vektor analysis · updated 2026-06-21
M&MS & SONS CORP 88
01
Safety
59 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
Vehicle OOS 15.4% (24-mo)13 veh insp · 24-mo · nat'l 22.26%
050%nat'l 22.26%
Driver OOS 0.0% (24-mo)36 drv insp · 24-mo · nat'l 6.67%
030%nat'l 6.67%
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
7.7% now▲ Worsening
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.
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.5 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 40-unit fleet — enough signal to read the safety record, though not a heavy sample.
- Registered power units
- 40
- Inspections · 24 mo
- 36
- Annualized
- ≈18 / yr
- Coverage
- ≈0.5 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 Driving34
- 393.45 Brake tubing / hose defectsVehicle Maintenance6
- 392.16 Failure to use seat beltUnsafe Driving5
- 393.9 Inoperative required lampsVehicle Maintenance5
- 395.8 Record of duty status (log / ELD) not current or missingHOS Compliance4 · 2 OOS
- 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance3
- 393.11 Required lamps/reflectors missingVehicle Maintenance2
- 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance2 · 2 OOS
- 395.3 Driving beyond hours-of-service limitsHOS Compliance1
- 383.71 Commercial Driver's License (CDL)Driver Fitness1
02
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 (required)Filed with FMCSA
CargoNone
Surety bond (BMC-84)None
Insurance continuity· insurer · policy · lapses
$5M BIPD · 8 insurers · 1 lapseCoverage lapse
+2 earlier
Farm Bureau · 88–11
Great West · 12–18
Greenwich · 18–21
Arch · 18–20
Hallmark Specialty · 20–23
Starstone Specialty · 23–25
19882025
No BIPD policy is currently in force in the filing history. The authority record may still list one on file — request a COI to confirm current coverage.
8 insurer eras · collapsed from 17 filings
| Insurer | Period | Limit | Renewals |
|---|---|---|---|
| STARSTONE SPECIALTY INSURANCE COMPANY | May 2023 → Sep 2025 | $5M | 1 |
| CRUM & FORSTER SPECIALTY INSURANCE COMPANY | Oct 2020 → Oct 2020 | $5M | 5 |
| HALLMARK SPECIALTY INSURANCE COMPANY | Oct 2020 → May 2023 | $5M | 1 |
| ARCH INSURANCE COMPANY | Oct 2018 → Oct 2020 | $5M | 2 |
| GREENWICH INSURANCE COMPANY | Oct 2018 → Aug 2021 | $5M | 1 |
| GREAT WEST CASUALTY CO. | Oct 2012 → Oct 2018 | $5M | 2 |
| CLASSIC INSURANCE CO | Sep 2011 → Oct 2012 | $5M | 3 |
| FARM BUREAU MUTUAL INSURANCE CO. | Apr 1988 → Sep 2011 | $5M | 2 |
03
Equipment & fleet
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 40
- Observed power (24 mo)
- 24
- Trailers (towed)
- 29
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
2000
Oldest model yr
VINs decoded
04
Operations & lanes
Revealed by inspection density across 7 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Operating radiusRegional
revealedStates observed77
US statesInspections · 24 mo3636
IA busiestInspection density by state· each tile = a state · shade = inspections, last 24 mo
Home base
HUMBOLDT, IA
Top corridor
IA
Density
fewermore
05
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 (7 trucks · 6 carriers)
Across all inspections on record: USDOT 175635USDOT 3722022USDOT 1836374USDOT 3700808USDOT 3649179USDOT 230291
Shares a registration email domain with other carriers
@mssons.com — 3 carriers: USDOT 1331978USDOT 3586450
Capacity consistency· registered vs roadside-observed power units
Registered (MCS-150)4040
Observed (24 mo)2424
Shared w/ other carriers77
Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.
06
Identity & contact
FMCSA census + L&I dossier
Location
- Physical address
- 1605 SASSY LANE, HUMBOLDT, IA, 50548
- Mailing address
- PO BOX 334, HUMBOLDT, IA, 50548
- Operation
- Interstate· Hazmat
Contact
- Phone
- (515) 332-3303
- Fax
- (515) 332-1716
- teri@mssons.com
- Web domain
- mssons.com
Registration
- Officer
- Teri Dunphy
- USDOT / docket
- 133751 · MC-143871
- First registered
- 06/01/1974
- Last MCS-150
- 04/03/2026 · 2,427,838 mi (2024)
- FMCSA safety rating
- Satisfactory · 04/14/2025
- D-U-N-S
- 55588420
Fleet (self-reported · MCS-150)
07
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.
08
Reviews
Verified broker, shipper & driver reviews — moderated
Performance ratings only — never the Vektor risk score
No verified reviews yet
Be the first broker or shipper to rate MS & SONS CORP. Reviews cover performance only — on-time delivery, payment speed, communication — and never affect the Vektor risk score.
Leave a review09
Frequently asked
What is MS & SONS CORP's USDOT number?
MS & SONS CORP's USDOT number is 133751, and its motor carrier number is MC-143871.
Is MS & SONS CORP authorized to operate?
As of 2026-06-21, MS & SONS CORP is active in the FMCSA register with common, contract, broker operating authority on file.
What is MS & SONS CORP's safety record?
MS & SONS CORP has a 15.4% vehicle out-of-service rate (national average 22.26%) across 59 roadside inspections, with 2 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 88/100 (tier: clear).
How big is MS & SONS CORP's fleet?
MS & SONS CORP operates 40 power units and 42 drivers per its most recent MCS-150 filing.
Where is MS & SONS CORP based?
MS & SONS CORP is based in HUMBOLDT, IA, with roadside inspections recorded across 7 states.