Equipment unit · VIN-decoded · NHTSA vPIC

2021 Peterbilt 579

1XPBD49XXMD755870 · Truck-Tractor · TRUCK
Carriers run under2
37 mo
Inspections20
all-time
OOS inspections2
of 20
First seenJun 28, 2023
NM
Last seenJul 3, 2026
TX
Inspected under 2 different carriers in 37 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
1XPBD49XXMD755870
Make
Peterbilt
Model
579
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
Jun 14, 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 · Jun 28, 2023 – Jul 3, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Jul 3, 2026TXI · Full4OOSAMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Jun 5, 2026USIII · Driver-only0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
May 15, 2026USI · Full1—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Apr 6, 2026USI · Full2—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Mar 3, 2026TXIII · Driver-only0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Nov 21, 2025TXII · Walk-around0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Nov 6, 2025TXII · Walk-around2—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Nov 4, 2025TXI · Full2—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
Oct 23, 2025TXI · Full2—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
Sep 8, 2025TXI · Full3—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Sep 1, 2025TXI · Full2OOSAMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
Aug 22, 2025TXI · Full3—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
Aug 15, 2025USI · Full0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Jun 9, 2025TXIII · Driver-only0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/DF
May 29, 2025USI · Full0—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/MX
Apr 21, 2025USI · Full1—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV 389808646ES7L/CI
Dec 8, 2023TNIII · Driver-only0—SADDLE UP EXPRESS INCORPORATED 2833025R521137/TX
Aug 29, 2023NMI · Full0—SADDLE UP EXPRESS INCORPORATED 2833025R521137/TX
Jun 29, 2023NMI · Full0—SADDLE UP EXPRESS INCORPORATED 2833025R521137/TX
Jun 28, 2023NMI · Full0—SADDLE UP EXPRESS INCORPORATED 2833025R521137/TX
03

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CV3898086Apr 21, 2025Jul 3, 202616CI
SADDLE UP EXPRESS INCORPORATED2833025Jun 28, 2023Dec 8, 20234TX
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.
46ES7LMX1AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CVMay 29, 2025 → Jul 3, 20269
46ES7LCI—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CVApr 21, 2025 → Jun 5, 20266
46ES7LDF—AMBAS FRONTERAS SERVICIOS DE TRANSPORTE S DE RL DE CVJun 9, 2025 → Jun 9, 20251
R521137TX—SADDLE UP EXPRESS INCORPORATEDJun 28, 2023 → Dec 8, 20234
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 14, 2026