Equipment unit · VIN-decoded · NHTSA vPIC

2024 Peterbilt 579

1XPBD49X3RD664169 · Truck-Tractor · TRUCK
Carriers run under3
23 mo
Inspections6
all-time
OOS inspections2
of 6
First seenMar 19, 2024
IL
Last seenFeb 9, 2026
MS
Inspected under 3 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
1XPBD49X3RD664169
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
3 · valid

Deterministic · position 9; calculated value 3.

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
664169

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 · Mar 19, 2024 – Feb 9, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Feb 9, 2026MSIII · Driver-only2OOSCIRCLE L TRANSPORT LLC 2793637A555221/MS
Jul 22, 2025LAII · Walk-around0CIRCLE L TRANSPORT LLC 2793637A555221/MS
Jun 11, 2025COIII · Driver-only1OOSCIRCLE L TRANSPORT LLC 2793637A555221/MS
Dec 18, 2024IAIII · Driver-only1KAG SPECIALTY PRODUCTS GROUP LLC 76483PWV5668/OH
Sep 19, 2024SDIII · Driver-only0KAG SPECIALTY PRODUCTS GROUP LLC 76483PWV5668/OH
Mar 19, 2024ILI · Full0FORT TRANSFER COMPANY 134578PWV5668/OH
03

Carriers this unit has run under

3 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
CIRCLE L TRANSPORT LLC2793637Jun 11, 2025Feb 9, 20263MS
KAG SPECIALTY PRODUCTS GROUP LLC76483Sep 19, 2024Dec 18, 20242OH
FORT TRANSFER COMPANY134578Mar 19, 2024Mar 19, 20241IL
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.
A555221MSCIRCLE L TRANSPORT LLCJun 11, 2025Feb 9, 20263
PWV5668OH1KAG SPECIALTY PRODUCTS GROUP LLCSep 19, 2024Dec 18, 20242
PWV5668OHFORT TRANSFER COMPANYMar 19, 2024Mar 19, 20241
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 24, 2026