Equipment unit · VIN-decoded · NHTSA vPIC

2021 Volvo Truck VNR

4V4WC9DH0MN279758 · Truck-Tractor · TRUCK
Carriers run under2
23 mo
Inspections7
all-time
OOS inspections0
of 7
First seenJul 31, 2024
AL
Last seenJun 11, 2026
TN
Inspected under 2 different carriers in 23 months
A unit that bounces between many operators can indicate slip-seating, heavy sub-haul, or double-brokering. Review the carrier timeline below for load integrity — context for human judgment, not a verdict.
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
4V4WC9DH0MN279758
Make
Volvo Truck
Model
VNR
Model year
2021
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 28, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
4V4

Deterministic · VIN positions 1–3.

Vehicle descriptor section
WC9DH

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1991 or 2021

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
279758

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Make
VOLVO TRUCK

Prefix basis · 322 decoded VINs at 100.0% prefix purity.

Model
VNR

Prefix basis · 322 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

Not established

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jul 31, 2024 – Jun 11, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jun 11, 2026TNIII · Driver-only0—3 RUSTY NAILS INC 1507845X0899HY/TN
May 14, 2026OKI · Full1—3 RUSTY NAILS INC 1507845D222HU/TN
May 14, 2026OKI · Full1—3 RUSTY NAILS INC 1507845D222HU/TN
May 14, 2026OKI · Full1—3 RUSTY NAILS INC 1507845D222HU/TN
May 28, 2025ALIII · Driver-only0—SUMMERFORD TRUCK LINE INC 978791180339/AL
Nov 12, 2024ALIII · Driver-only0—SUMMERFORD TRUCK LINE INC 978791180339/AL
Jul 31, 2024ALI · Full0—SUMMERFORD TRUCK LINE INC 978791180339/AL
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
3 RUSTY NAILS INC1507845May 14, 2026Jun 11, 20264TN
SUMMERFORD TRUCK LINE INC97879Jul 31, 2024May 28, 20253AL
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
04

Plate & unit-number history

The same truck under different plate registrations across carriers

PlateState / prov.Unit no.CarrierDate rangeInsp.
X0899HYTN—3 RUSTY NAILS INCJun 11, 2026 → Jun 11, 20261
D222HUTN13 RUSTY NAILS INCMay 14, 2026 → May 14, 20263
1180339AL—SUMMERFORD TRUCK LINE INCJul 31, 2024 → May 28, 20253
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 28, 2026