Equipment unit · VIN-decoded · NHTSA vPIC

1996 Peterbilt 357

1XPALA0X0TD421999 · Truck · TRUCK
Carriers run under2
16 mo
Inspections4
all-time
OOS inspections4
of 4
First seenSep 8, 2023
AZ
Last seenJan 17, 2025
AZ
Inspected under 2 different carriers in 16 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
1XPALA0X0TD421999
Make
Peterbilt
Model
357
Model year
1996
Body class
Truck
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jul 12, 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
1XP

Deterministic · VIN positions 1–3.

Vehicle descriptor section
ALA0X

Deterministic · VIN positions 4–8.

Check digit
0 · valid

Deterministic · position 9; calculated value 0.

Model year candidates
1996 or 2026

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

North American serial sequence
421999

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
PETERBILT

Prefix basis · 40 decoded VINs at 100.0% prefix purity.

Model
357

Prefix basis · 40 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.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
1996

Observed directly for this VIN via NHTSA vPIC.

Observed make
PETERBILT

Observed directly for this VIN via NHTSA vPIC.

Observed model
357

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRUCK

Observed directly for this VIN via NHTSA vPIC.

GVWR
Class 8: 33,001 lb and above (14,969 kg and above)

Observed directly for this VIN via NHTSA vPIC.

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 · Sep 8, 2023 – Jan 17, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Jan 17, 2025AZII · Walk-around9OOSUNITED CONCRETE OF ARIZONA LLC 4105985F5A1GK/AZ
Jan 13, 2025AZI · Full11OOSUNITED CONCRETE OF ARIZONA LLC 4105985F5A1GK/AZ
Nov 25, 2024AZII · Walk-around9OOSUNITED CONCRETE OF ARIZONA LLC 4105985F5A1GK/AZ
Sep 8, 2023AZII · Walk-around11OOSUNITED CONCRETE SOLUTIONS LLC 3281352F5A1GK/AZ
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
UNITED CONCRETE OF ARIZONA LLC4105985Nov 25, 2024Jan 17, 20253AZ
UNITED CONCRETE SOLUTIONS LLC3281352Sep 8, 2023Sep 8, 20231AZ
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.
F5A1GKAZUNITED CONCRETE OF ARIZONA LLCNov 25, 2024Jan 17, 20253
F5A1GKAZUNITED CONCRETE SOLUTIONS LLCSep 8, 2023Sep 8, 20231
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 12, 2026