Equipment unit · VIN-decoded · NHTSA vPIC

2011 Mac Trailer Manufacturing

5MAPA4821BA018960 · Trailer · TRAILER
Carriers run under2
13 mo
Inspections5
all-time
OOS inspections1
of 5
First seenJul 11, 2024
PA
Last seenAug 4, 2025
PA
Inspected under 2 different carriers in 13 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
5MAPA4821BA018960
Make
Mac Trailer Manufacturing
Model
MAC TRAILER MANUFACTURING
Model year
2011
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jul 5, 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
5MA

Deterministic · VIN positions 1–3.

Vehicle descriptor section
PA482

Deterministic · VIN positions 4–8.

Check digit
1 · valid

Deterministic · position 9; calculated value 1.

Model year candidates
1981 or 2011

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
018960

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
MAC TRAILER MANUFACTURING

Prefix basis · 1,229 decoded VINs at 100.0% prefix purity.

Model
MAC TRAILER MANUFACTURING

Prefix basis · 1,229 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
2011

Observed directly for this VIN via NHTSA vPIC.

Observed make
MAC TRAILER MANUFACTURING

Observed directly for this VIN via NHTSA vPIC.

Observed model
MAC TRAILER MANUFACTURING

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

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 · Jul 11, 2024 – Aug 4, 2025

DateStateLevelViol.OOSCarrier (DOT)Plate
Aug 4, 2025PAI · Full5OOSCHP TRANS INC 1821120276258B/ME
Aug 4, 2025PAII · Walk-around2WESTERN EXPRESS INC 511412S1199HY/TN
Feb 4, 2025PAIII · Driver-only0CHP TRANS INC 1821120276258B/ME
Oct 22, 2024PAII · Walk-around1CHP TRANS INC 1821120276258B/ME
Jul 11, 2024PAII · Walk-around2CHP TRANS INC 1821120276258B/ME
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
WESTERN EXPRESS INC511412Aug 4, 2025Aug 4, 20251TN
CHP TRANS INC1821120Jul 11, 2024Aug 4, 20254PA
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.
S1199HYTNWESTERN EXPRESS INCAug 4, 2025Aug 4, 20251
276258BMECHP TRANS INCJul 11, 2024Aug 4, 20254
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jul 5, 2026