Equipment unit · VIN-decoded · NHTSA vPIC

2017 Peterbilt 579

1XPBDP9X4HD434074 · Truck-Tractor · TRUCK
Carriers run under1
27 mo
Inspections7
all-time
OOS inspections1
of 7
First seenDec 11, 2023
WI
Last seenMar 31, 2026
WI
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1XPBDP9X4HD434074
Make
Peterbilt
Model
579
Model year
2017
Body class
Truck-Tractor
Vehicle type
TRUCK
GVWR
Class 8: 33,001 lb and above (14,969 kg and above)
Decoded at
Jun 21, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
View sourced platform decode
02

Inspection history

Every roadside inspection of this VIN, newest first · Dec 11, 2023 – Mar 31, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Mar 31, 2026WIIII · Driver-only1—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
Dec 16, 2025WIIII · Driver-only1—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
Dec 11, 2025WIII · Walk-around7OOSPONY EXPRESS CONTRACTING LLC 29372992937299/WI
Feb 20, 2025WIIII · Driver-only0—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
Dec 3, 2024WIIII · Driver-only1—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
Nov 7, 2024WIIII · Driver-only1—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
Dec 11, 2023WII · Full2—PONY EXPRESS CONTRACTING LLC 293729937670Z/WI
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
PONY EXPRESS CONTRACTING LLC2937299Dec 11, 2023Mar 31, 20267WI
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.
37670ZWI—PONY EXPRESS CONTRACTING LLCDec 11, 2023 → Mar 31, 20266
2937299WI—PONY EXPRESS CONTRACTING LLCDec 11, 2025 → Dec 11, 20251
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 21, 2026