Equipment unit · VIN-decoded · NHTSA vPIC

2021 Utility trailer manufacturer Utility Trailer Manufacturer

1UYVS2531M2045829 · Trailer · TRAILER

Carriers run under1

29 mo

Inspections9

all-time

OOS inspections1

of 9

First seenDec 12, 2023

Last seenMay 23, 2026

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 · Dec 12, 2023 – May 23, 2026

Date	State	Level	Viol.	OOS	Carrier (DOT)	Plate
May 23, 2026	CA	II · Walk-around	3	OOS	FRONTIER CARGO SERVICES INC 2636467	4SZ19990/CA
Mar 20, 2026	CA	III · Driver-only	1	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Jun 23, 2025	CA	III · Driver-only	2	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Apr 16, 2025	CA	II · Walk-around	1	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Jan 1, 2025	NV	II · Walk-around	0	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Aug 6, 2024	UT	III · Driver-only	2	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Jul 1, 2024	CA	I · Full	1	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Feb 26, 2024	NV	II · Walk-around	0	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA
Dec 12, 2023	CA	I · Full	0	—	FRONTIER CARGO SERVICES INC 2636467	4SZ1990/CA

1 distinct carrier · grouped by DOT · newest activity first

Carrier	DOT	First seen	Last seen	Insp.	State
FRONTIER CARGO SERVICES INC	2636467	Dec 12, 2023	May 23, 2026	9	CA

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.
4SZ19990	CA	—	FRONTIER CARGO SERVICES INC	May 23, 2026 → May 23, 2026	1
4SZ1990	CA	—	FRONTIER CARGO SERVICES INC	Dec 12, 2023 → Mar 20, 2026	8

Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026