Equipment unit · VIN-decoded · NHTSA vPIC

2021 Western star 4900

5KJJALDR4MPMK2008 · Truck-Tractor · TRUCK
Carriers run under2
31 mo
Inspections4
all-time
OOS inspections1
of 4
First seen10/05/2023
AK
Last seen05/20/2026
AK
Inspected under 2 different carriers in 31 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
5KJJALDR4MPMK2008
Make
Western star
Model
4900
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
07/17/2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
02

Inspection history

Every roadside inspection of this VIN, newest first · 10/05/2023 – 05/20/2026

DateStateLevelViol.OOSCarrier (DOT)Plate
05/20/2026AKIII · Driver-only3—AHTNA CONSTRUCTION & PRIMARY PRODUCTS COMPANY LLC 1677496KNR210/AK
08/09/2025AKI · Full8OOSROBERT RIDDLE 1698191KNR572/AK
05/22/2024AKIII · Driver-only1—ROBERT RIDDLE 1698191KHY835/AK
10/05/2023AKII · Walk-around3—ROBERT RIDDLE 1698191KHY835/AK
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
AHTNA CONSTRUCTION & PRIMARY PRODUCTS COMPANY LLC167749605/20/202605/20/20261AK
ROBERT RIDDLE169819110/05/202308/09/20253AK
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.
KNR210AK—AHTNA CONSTRUCTION & PRIMARY PRODUCTS COMPANY LLC05/20/2026 → 05/20/20261
KNR572AK—ROBERT RIDDLE08/09/2025 → 08/09/20251
KHY835AK—ROBERT RIDDLE10/05/2023 → 05/22/20242
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 07/17/2026