Carrier profile · USDOT 348981 · Updated Jun 13, 2026
W B Mason Co Inc
834 power unitsavg 3.3 yrNational · 21 statesBROCKTON, MA88/100
AUTHORITY STATUS UNKNOWNRATED CONDITIONALHAZMAT
Equipment
Haulable capacity (power units only — trailers are towed context), equipment mix, and the VIN-decoded unit roster. Click any VIN to trace that unit across every carrier that has run it.
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 834
- Observed power (24 mo)
- 303
- Trailers (towed)
- 41
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
2001
Oldest model yr
26.1%
VINs decoded
Unit roster· VIN-decoded from inspections · NHTSA vPIC
| VIN | Type | Year | Make | Model | Insp. | Last seen |
|---|---|---|---|---|---|---|
| 3HCDZAPR9RL667783View sourced platform decode | Truck-Tractor | 2024 | INTERNATIONAL | LT62F | 10 | May 19, 2026 |
| 3HAEUMML9RL777195View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 9 | Jul 28, 2026 |
| 3HAEUMML5RL774780View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 9 | Jul 15, 2026 |
| 3HAEUMML3RL780108View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 6 | Jul 31, 2026 |
| 3HAEUMMN8RL111639View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 6 | Apr 24, 2026 |
| 1HTEUMMN0SS383309View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 6 | Apr 14, 2026 |
| 3HAEUMMN2RL750695View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 6 | Jul 14, 2025 |
| 3HAEUMML4PL777196View sourced platform decode | Truck | 2023 | INTERNATIONAL | MV607 | 5 | Jun 10, 2026 |
| 4UZAARFC9RCUY8007View sourced platform decode | Step Van/Walk-in Van | 2024 | FREIGHTLINER | MT 55 Chassis | 5 | May 12, 2026 |
| 3HAEUMML5RL776206View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 5 | Apr 21, 2026 |
| 3HAEUMMN4RL111640View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 5 | Apr 10, 2026 |
| 4UZAARFC9PCUY7890View sourced platform decode | Step Van/Walk-in Van | 2023 | FREIGHTLINER | MT 55 Chassis | 5 | Feb 4, 2026 |
| 3HAEUMMN4RL749256View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 5 | Jan 13, 2026 |
| 3HAEUMML1RL778325View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Jul 28, 2026 |
| 3HAEUMMN9RL128014View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Jun 26, 2026 |
| 3HCDZAPR7RL667782View sourced platform decode | Truck-Tractor | 2024 | INTERNATIONAL | LT62F | 4 | Jun 16, 2026 |
| 3HAEUMML7RL776210View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | May 13, 2026 |
| 3ALACXFC4JDJK1634View sourced platform decode | Truck | 2018 | FREIGHTLINER | M2 | 4 | Apr 28, 2026 |
| 3HAEUMML9RL780095View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Apr 14, 2026 |
| 3HAEUMML8SL450566View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 4 | Apr 14, 2026 |
| 3HAEUMMN5RL109749View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Apr 1, 2026 |
| 4UZAARFC1SCVW7435View sourced platform decode | Incomplete - Chassis Cab (Number of Cab Unknown) | 2025 | FREIGHTLINER | MT 55 Chassis | 4 | Mar 10, 2026 |
| 4UZBVK113LGLF4417View sourced platform decode | Incomplete - Chassis Cab (Single Cab) | 2020 | MITSUBISHI FUSO | FE160 (FEC7TS) | 4 | Dec 9, 2025 |
| 3HAEUMMNXRL109746View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Dec 1, 2025 |
| 1HTEUMML6SS460831View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 4 | Nov 20, 2025 |
| 3HAEUMMLXSL442744View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 4 | Jun 23, 2025 |
| 3HAEUMMN3RL128011View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 4 | Apr 23, 2025 |
| 3HCDZAPR3RL667780View sourced platform decode | Truck-Tractor | 2024 | INTERNATIONAL | LT62F | 3 | Jul 23, 2026 |
| 3HAEUMMN6RL749260View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Jul 23, 2026 |
| 3HSDZAPRXSN268377View sourced platform decode | Truck-Tractor | 2025 | INTERNATIONAL | LT62F | 3 | Jul 9, 2026 |
| 3HAEUMML4RL777203View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Jun 15, 2026 |
| 3HAEUMMN3RL111645View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Jun 4, 2026 |
| 4UZAARFC1SCVW7368View sourced platform decode | Incomplete - Chassis Cab (Number of Cab Unknown) | 2025 | FREIGHTLINER | MT 55 Chassis | 3 | Jun 1, 2026 |
| 1UYVS253XP3921537View sourced platform decode | Trailer | 2023 | UTILITY TRAILER MA | Utility Trailer Manufacturer | 3 | May 19, 2026 |
| 3HCDZAPR3RL667777View sourced platform decode | Truck-Tractor | 2024 | INTERNATIONAL | LT62F | 3 | May 5, 2026 |
| 3HAEUMMN7RL109736View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Apr 20, 2026 |
| 4UZAARFC4PCUY7750View sourced platform decode | Step Van/Walk-in Van | 2023 | FREIGHTLINER | MT 55 Chassis | 3 | Mar 19, 2026 |
| 1HTEUMML6SS471795View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 3 | Feb 27, 2026 |
| 3HAEUMMN3RL745148View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Feb 19, 2026 |
| 4UZAARFCXPCUY7901View sourced platform decode | Step Van/Walk-in Van | 2023 | FREIGHTLINER | MT 55 Chassis | 3 | Feb 10, 2026 |
| 1FVACWFC1SHVT4990View sourced platform decode | Truck | 2025 | FREIGHTLINER | M2 | 3 | Feb 4, 2026 |
| 3HCDZAPR5RL667778View sourced platform decode | Truck-Tractor | 2024 | INTERNATIONAL | LT62F | 3 | Feb 3, 2026 |
| 4UZAARFC7RCUY7972View sourced platform decode | Step Van/Walk-in Van | 2024 | FREIGHTLINER | MT 55 Chassis | 3 | Jan 22, 2026 |
| 2NP2HM6X7LM652918View sourced platform decode | Truck | 2020 | PETERBILT | 337 | 3 | Jan 7, 2026 |
| 3HAEUMMLXSL474710View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 3 | Dec 1, 2025 |
| 4UZAARFC6PCUY7751View sourced platform decode | Step Van/Walk-in Van | 2023 | FREIGHTLINER | MT 55 Chassis | 3 | Nov 6, 2025 |
| 3HAEUMML7SL460828View sourced platform decode | Truck | 2025 | INTERNATIONAL | MV607 | 3 | Nov 5, 2025 |
| 3HAEUMML6RL777199View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Sep 23, 2025 |
| 3HAEUMMN7RL128013View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 3 | Jul 16, 2025 |
| 3HAEUMML3PL777190View sourced platform decode | Truck | 2023 | INTERNATIONAL | MV607 | 3 | Feb 21, 2025 |
| 4UZAARDU5HCJJ4598View sourced platform decode | Step Van/Walk-in Van | 2017 | FREIGHTLINER | MT 55 Chassis | 3 | Nov 4, 2024 |
| 1HTEUMML1SS471798View sourced platform decode | Power unit | 2025 | INTL | — | 2 | Aug 5, 2026 |
| 3HAEUMML6SL402497View sourced platform decode | Power unit | 2025 | INTERNATIO | — | 2 | Jul 31, 2026 |
| 3HAEUMML7SL474714View sourced platform decode | Power unit | 2025 | INTERNATIO | — | 2 | Jul 24, 2026 |
| 3HAEUMMLXSL409923View sourced platform decode | Power unit | 2025 | INTERNATIO | — | 2 | Jul 24, 2026 |
| 3HAEUMML7RL780502View sourced platform decode | Power unit | 2024 | INTERNATIO | — | 2 | Jul 23, 2026 |
| 1UYVS253XR3160723View sourced platform decode | Trailer | 2024 | UTIL | — | 2 | Jul 9, 2026 |
| 3HAEUMML7RL776207View sourced platform decode | Truck | 2024 | INTERNATIONAL | MV607 | 2 | Jul 8, 2026 |
| 1HTEUMMN6SS391270View sourced platform decode | Power unit | 2025 | INTERNATIO | — | 2 | Jul 2, 2026 |
| 4UZAARFC7PCUY7838View sourced platform decode | Power unit | 2023 | FREIGHTLIN | — | 2 | Jun 26, 2026 |
Showing 60 of 200 unique VINs · most-inspected first.