Equipment unit · VIN-decoded · NHTSA vPIC

2024 Peterbilt 579

1XPBD49X4RD610220 · Truck-Tractor · TRUCK
Carriers run under3
25 mo
Inspections6
all-time
OOS inspections0
of 6
First seenApr 15, 2024
CA
Last seenMay 28, 2026
IA
Inspected under 3 different carriers in 25 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
1XPBD49X4RD610220
Make
Peterbilt
Model
579
Model year
2024
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 24, 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
BD49X

Deterministic · VIN positions 4–8.

Check digit
4 · valid

Deterministic · position 9; calculated value 4.

Model year candidates
1994 or 2024

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

North American serial sequence
610220

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 · 26,166 decoded VINs at 100.0% prefix purity.

Model
579

Prefix basis · 26,166 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
2024

Observed directly for this VIN via NHTSA vPIC.

Observed make
PETERBILT

Observed directly for this VIN via NHTSA vPIC.

Observed model
579

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Truck-Tractor

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 · Apr 15, 2024 – May 28, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
May 28, 2026IAIII · Driver-only2W M JOHNSON TRUCK LINES INC 240645MX4930/IA
Mar 21, 2025MOIII · Driver-only3KAL FREIGHT INC 2511620ZP44825/CA
Jul 24, 2024CAI · Full5SPG TRANSPORTATION INC 2881143ZP12526/CA
Jul 12, 2024OKIII · Driver-only0SPG TRANSPORTATION INC 2881143ZP12526/CA
May 9, 2024CAI · Full3SPG TRANSPORTATION INC 2881143ZP12526/CA
Apr 15, 2024CAI · Full6SPG TRANSPORTATION INC 2881143ZP12526/CA
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
W M JOHNSON TRUCK LINES INC240645May 28, 2026May 28, 20261IA
KAL FREIGHT INC2511620Mar 21, 2025Mar 21, 20251TX
SPG TRANSPORTATION INC2881143Apr 15, 2024Jul 24, 20244TX
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.
MX4930IAW M JOHNSON TRUCK LINES INCMay 28, 2026May 28, 20261
ZP44825CAKAL FREIGHT INCMar 21, 2025Mar 21, 20251
ZP12526CASPG TRANSPORTATION INCApr 15, 2024Jul 24, 20244
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 24, 2026