Equipment unit · VIN-decoded · NHTSA vPIC

2022 Polar tank trailer Polar Tank Trailer

3H6KL4322N3117762 · Trailer · TRAILER

Carriers run under1

8 mo

Inspections5

all-time

OOS inspections1

of 5

First seenOct 11, 2024

Last seenJun 10, 2025

Decoded identity

From the 17-character VIN via NHTSA vPIC

vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.

Every roadside inspection of this VIN, newest first · Oct 11, 2024 – Jun 10, 2025

Date	State	Level	Viol.	OOS	Carrier (DOT)	Plate
Jun 10, 2025	OK	II · Walk-around	1	—	MARK WALKER 819251	AZ5371/OK
May 15, 2025	OK	I · Full	9	OOS	MARK WALKER 819251	AZ5371/OK
May 9, 2025	OK	II · Walk-around	10	—	MARK WALKER 819251	AZ5371/OK
Nov 13, 2024	OK	II · Walk-around	3	—	MARK WALKER 819251	AZ5371/OK
Oct 11, 2024	OK	III · Driver-only	1	—	MARK WALKER 819251	AZ5371/OK

1 distinct carrier · grouped by DOT · newest activity first

Carrier	DOT	First seen	Last seen	Insp.	State
MARK WALKER	819251	Oct 11, 2024	Jun 10, 2025	5	OK

Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.

The same truck under different plate registrations across carriers

Plate	State / prov.	Unit no.	Carrier	Date range	Insp.
AZ5371	OK	—	MARK WALKER	Oct 11, 2024 → Jun 10, 2025	5

Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 29, 2026