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A-OX WELDING SUPPLY COMPANY INC
Sioux Falls, SD
CarrierChk vetting signal
No flags raised
Authority, insurance, safety rating and crash records checked
FMCSA status: Active registration · no operating authority · DOT 44382
Active
Satisfactory
Broker Vetting Summary
Key signals from current FMCSA records
Authority
No Active Authority
Common carrier
Insurance
Not Found
No coverage amount on file
Safety
Satisfactory
17.5% OOS · 62 inspections on record
✓ No risk flags found on authority or insurance records
Vetting notes
- Active FMCSA registration, but no active for-hire operating authority on record
- Registered with FMCSA as a private carrier — not registered to haul other companies' freight for hire
- No active insurance filing found on record
- FMCSA safety rating: Satisfactory
- Vehicle out-of-service rate 18.2% — below the 20.7% national average
- 62 FMCSA inspections on record
Company Information
Registration, contact and cargo details
FMCSA Registration
DOT Number
44382
Safety Rating
Satisfactory
Entity Type
Corporation
Operation Classification
Private (property)
MCS-150 Filed
April 8, 2026
FMCSA Registration
June 1, 1974
Annual Mileage
1,015,289 mi (2025)
Contact Information
Address
101 N Harlem Avenue, Sioux Falls, SD 57104
Phone
Email
Owner / Officer
Tiffany Anderson
Officer 2
Kelly Kleinwolterink
Cargo Types
General FreightLiquids/GasesOther Cargo
Safety Snapshot
Out-of-service rates, violations and crashes
Safety & Inspection Summary
Total Inspections
62
Driver Inspections
34
Vehicle Inspections
49
Out-of-Service Violations
10
Violations by Category
Vehicle Maintenance30
Unsafe Driving0
Hours of Service2
OOS Rates vs. National Average
Driver OOS Rate0.0% · national avg 5.5%
✓ Below national average
Vehicle OOS Rate18.2% · national avg 20.7%
✓ Below national average
17.5% of 40 inspections in the last 24 months put a driver or vehicle out of service —
54th percentile among carriers with 25–99 inspections (lower is better).
CarrierChk calculation from FMCSA roadside inspection records, not an FMCSA score.
Inspection Trend by Year
2026
2025
2024
Violation Rate by Category
Share of roadside inspections in FMCSA's rolling 24-month window that found a violation in each category. The individual violations are listed under each inspection in Inspection Details below. None of this is the basis of the safety rating, which comes from an on-site compliance review.
Vehicle Maintenance
10 of 35 inspections
Unsafe Driving
0 of 42 inspections
Hours of Service
1 of 42 inspections
Driver Fitness
0 of 42 inspections
Controlled Substances
0 of 42 inspections
Fleet & Operating Areas
Observed roadside activity and equipment
Where This Carrier Operates
States where this carrier's roadside inspections were recorded
FewerMore
SD27
MN12
NE7
US2
IA1
ND1
Fleet & Equipment (30)
Vehicles identified in this carrier's inspection history. Year, make, model and equipment type are decoded from the VIN.
Power units
~20
of 30 reported to FMCSA
Trailers
~10
seen at inspection
Equipment types observed
Truck
12
Tank
7
Tractor
6
Dry Van
3
Pickup
1
Semi-trailer
1
Units on record
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2024 Applied Cryo Technologies | Tank · 43 ft | 1A9A44323RH939028 | 6 | 1 |
| 2023 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EH9PN311587 | 6 | — |
| 2021 Kenworth T3 Series | Truck · Class 8 | 2NKHLJ9X8MM446971 | 5 | — |
| 2024 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EH6RN645966 | 5 | 1 |
| 2024 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EHXRN645825 | 5 | — |
| 2019 Western Star 4700 | Truck · Class 8 | 5KKHAXFE4KPKS1069 | 5 | 2 |
| 2023 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EH7PN303634 | 4 | — |
| 2012 Alloy Custom Products | Tank · 43 ft | 1A9PA4325CD503072 | 3 | — |
| 1989 Great Dane Trailers | Dry Van · 6 ft | 1GRAA0627KB165650 | 3 | — |
| 2023 Kenworth T680 | Truck · Class 8 | 1NKYLP9X4PJ231182 | 3 | — |
Show all 30 units
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2022 Applied Cryo Technologies | Tank · 45 ft | 1A9A44525NH939961 | 2 | — |
| Alloy Trai | Semi-trailer | 1APA43214D503006 | 2 | — |
| 2011 Freightliner M2 | Truck · Class 8 | 1FVHCYBS2BHAZ5714 | 2 | — |
| 2015 Freightliner M2 | Truck · Class 8 | 1FVHCYCY4FHGP4681 | 2 | 2 |
| 2025 Kenworth T380 | Truck · Class 7 | 2NK4HJ7X2SM152563 | 2 | — |
| 2024 Applied Cryo Technologies | Tank · 42 ft | 1A9A44223RH939029 | 1 | — |
| 2020 Applied Cryo Technologies | Tank · 43 ft | 1A9A44322LH939738 | 1 | — |
| 2019 Applied Cryo Technologies | Tank · 44 ft | 1A9A44423KH939650 | 1 | — |
| 2013 Alloy Custom Products | Tank · 42 ft | 1A9PA4220DD503001 | 1 | — |
| 2016 Ford F-250 | Pickup · Class 2 | 1FTBF2B61GEC33645 | 1 | — |
| 2007 Freightliner M2 | Truck · Class 7 | 1FVACXCS47HY34905 | 1 | — |
| 1989 Great Dane Trailers | Dry Van · 6 ft | 1GRAA0620KB165649 | 1 | — |
| 1989 Great Dane Trailers | Dry Van · 6 ft | 1GRAA0629KB165651 | 1 | — |
| 2013 International MA035 | Truck · Class 7 | 1HTMKAAN4DH302428 | 1 | — |
| 2023 Kenworth T680 | Truck · Class 8 | 1NKYLP9X2PJ231181 | 1 | — |
| 2017 Kenworth T3 Series | Truck · Class 8 | 2NKHLJ9X3HM157924 | 1 | 1 |
| 2021 Kenworth T3 Series | Truck · Class 8 | 2NKHLJ9XXMM446972 | 1 | 1 |
| 2020 International MV607 | Truck · Class 6 | 3HAEUMML1LL352321 | 1 | 1 |
| 2020 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EH9LN252664 | 1 | — |
| 2022 Volvo Truck VNL | Tractor · Class 8 | 4V4NC9EH9NN303633 | 1 | — |
A vehicle appearing here was recorded in an inspection — it is not proof the carrier still operates it today.
Inspection Details
Each roadside inspection with its violations
Inspection Records (62)
| Date | Report # | Location | Level | Viol | OOS | Shipper | Unit Type | Make | VIN | License |
|---|---|---|---|---|---|---|---|---|---|---|
| September 1, 2026 | T409000810 | NIOBRARA NE | III | — | — | AOX | Straight Truck |
WESTERN STAR |
5KKHAXFE4KPKS1069 |
SD PR36914 |
| June 17, 2026 | 5610001477 | CANTON SD | II | — | — | AOX WELDING | Straight Truck |
KENWORTH |
2NK4HJ7X2SM152563 |
SD PR52204 |
| June 11, 2026 | 0078000502 | NICOLLET MN | I | — | — | CARRIER | Truck Tractor Semi-trailer |
VOLVO TRUCK APPLIED CRYO TECHNOLOGIES |
4V4NC9EHXRN645825 1A9A44323RH939028 |
SD PR48905 SD U188898 |
| June 10, 2026 | 5310001827 | DELL RAPIDS SD | II | — | — | AOX WELDING SUPPLY LLC | Straight Truck |
KENWORTH |
1NKYLP9X4PJ231182 |
SD PR46219 |
| May 18, 2026 | HP16000086 | MITCHELL SD | III | — | — | A&B WELDING SUPPLY CO | Truck Tractor Semi-trailer |
VOLVO TRUCK GREAT DANE TRAILERS |
4V4NC9EH9PN311587 1GRAA0627KB165650 |
SD PR51192 SD U162401 |
| May 4, 2026 | TR82002537 | FARGO ND | II | 1 | 1 | AOX WELDING SUPPLY | Straight Truck |
FREIGHTLINER |
1FVHCYCY4FHGP4681 |
SD PR49883 |
| 393.75A3-TAOL | OOSTires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Tires | ||||||||
| April 22, 2026 | 5750001063 | CANTON SD | II | — | — | CARRIER | Straight Truck |
KENWORTH |
2NK4HJ7X2SM152563 |
SD PR52204 |
| April 21, 2026 | 5350001009 | BLUNT SD | I | — | — | AOX | Straight Truck |
FREIGHTLINER |
1FVACXCS47HY34905 |
SD PR27184 |
| April 4, 2026 | HP87001505 | VALLEY SPRINGS SD | III | — | — | NITROGEN | Truck Tractor Semi-trailer |
VOLVO TRUCK APPLIED CRYO TECHNOLOGIES |
4V4NC9EH9PN311587 1A9A44323RH939028 |
SD PR51192 SD U188898 |
| March 11, 2026 | 1663001054 | WORTHINGTON MN | III | 4 | — | — | Truck Tractor Semi-trailer |
VOLVO TRUCK ALLOY CUSTOM PRODUCTS |
4V4NC9EHXRN645825 1A9PA4220DD503001 |
SD PR48905 SD U103821 |
| 392.2-SLLIFTA | State/Local Laws - State tax/International Fuel Tax (IFTA) violation | |||||||||
| 395.3A2-HOSPD | HOS (Property) - Driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Tim | Hours | ||||||||
| 395.8E-HOSPD | HOS (Property) - No driver may make a false report in connection with a duty status. Explain | False Log | ||||||||
| 392.2-SLLIFTA | State/Local Laws - State tax/International Fuel Tax (IFTA) violation | |||||||||
Shippers Seen at Inspections
Shipper names recorded by roadside inspectors over roughly the last three years. Only inspected loads appear, so this is a sample of who the carrier hauls for, not a complete customer list. Names are as entered at the roadside; blanks and placeholders such as “N/A” or “same as carrier” are left out.
| Shipper | Inspections | Most recent |
|---|---|---|
| ABSOLUTE AIR | 11 | October 8, 2025 |
| LINDE GAS & EQUIPMENT | 3 | November 13, 2024 |
| A&B WELDING SUPPLY CO | 1 | May 18, 2026 |
| NITROGEN | 1 | April 4, 2026 |
| A0X | 1 | November 20, 2025 |
| AOX SUPPLY LLC | 1 | November 3, 2025 |
| ABOSOLUTE AIRLLC | 1 | July 8, 2025 |
| SHELL | 1 | May 14, 2024 |
| OX WELDING SUPPLY | 1 | April 17, 2024 |
| NUCOR | 1 | October 18, 2023 |
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Data sourced from FMCSA MCMIS via Socrata. Record last updated: September 27, 2026.
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