Paste a Peterbilt truck VIN to decode it against NHTSA vPIC, the federal filing the manufacturer made. Below the tool: the 6 WMI codes verified for Peterbilt, a real Peterbilt VIN read position by position, the GVWR classes its manufacturer registered, and 3 worked decodes of Peterbilt units from FMCSA roadside inspections. Record fetched 2026-09-27.
A World Manufacturer Identifier is the first three characters of the VIN. NHTSA assigns each one to a manufacturer, and vPIC records the vehicle type and country it was issued for. The 6 codes below are the ones verified for Peterbilt in vPIC: 1XP, 1NP, 2NP, 2XP, 3BP and 3WP. The list is built from the manufacturers the VINs sampled for this page decode to, and NHTSA can have issued Peterbilt other codes for other plants and vehicle types. 5 of them appeared in the 149 Peterbilt VINs sampled from FMCSA roadside inspection records for this page; the rest are registered with NHTSA but did not show up in that sample.
| WMI | Vehicle type | Country | Registered to | Makes filed | In sample |
|---|---|---|---|---|---|
| 1XP | Truck | United States | PETERBILT MOTORS COMPANY | PETERBILT | 92 VINs |
| 1NP | Incomplete Vehicle | United States | PETERBILT MOTORS COMPANY | PETERBILT | 36 VINs |
| 2NP | Incomplete Vehicle | Canada | PETERBILT MOTORS COMPANY | PETERBILT | 16 VINs |
| 2XP | Truck | Canada | PETERBILT MOTORS COMPANY | PETERBILT | 3 VINs |
| 3BP | Incomplete Vehicle | Mexico | PETERBILT MOTORS COMPANY | PETERBILT | 2 VINs |
| 3WP | Truck | Mexico | PETERBILT MOTORS COMPANY | PETERBILT | registered, not seen |
1XPBD49X4RD610198 is a Peterbilt truck-tractor recorded in a roadside inspection and decoded clean by vPIC. Reading it left to right:
vPIC's own pattern for this unit is 1XPBD49X*RD: the positions it decoded from, with the check digit masked. Two Peterbilt VINs that share that pattern share every attribute vPIC filed for it and differ only in the check digit and the serial.
Two reads of the gross vehicle weight rating, both from the federal record. First, what the manufacturer registered with NHTSA:
Second, the GVWR class vPIC returned for each of the 149 Peterbilt VINs in the sample (a class is filed on 147 of them; the rest carry no GVWR in the manufacturer's filing):
| GVWR class as filed | Units in sample |
|---|---|
| Class 8: 33,001 lb and above (14,969 kg and above) | 129 |
| Class 7: 26,001 - 33,000 lb (11,794 - 14,969 kg) | 12 |
| Class 6: 19,501 - 26,000 lb (8,845 - 11,794 kg) | 6 |
| not filed | 2 |
If the VIN is not to hand, the rating is on the certification label on the unit itself; how to find GVWR walks through where to look.
3 real Peterbilt VINs from FMCSA's roadside inspection file, each decoded by vPIC with error code 0. Every field shown is what the manufacturer filed; a field that is missing was not filed for that pattern. Paste any of them into the decoder above to see the full card.
FMCSA's Inspections Per Unit file (data.transportation.gov, dataset wt8s-2hbx) records every vehicle in a roadside inspection with the make code the inspector typed. It holds 439,000 truck tractor records under the code PTRB, 307,099 truck tractor records under the code PETERBILT and 121,856 straight truck records under the code PTRB. Native Base pulled 150 distinct VINs from those codes and sent them to NHTSA vPIC in batches: 150 came back, 149 decoded as PETERBILT, and 146 with a clean error code. The decode, not the inspector's code, decides what a unit is, which is why the same make appears under several spellings in the file.
Native Base verified 6 World Manufacturer Identifiers for Peterbilt in NHTSA vPIC: 1XP, 1NP, 2NP, 2XP, 3BP and 3WP. The list is built from the manufacturers the VINs sampled for this page decode to, and NHTSA can have issued Peterbilt other codes, so a VIN starting with a code not listed here can still be a Peterbilt. The WMI is the first three characters of the 17-character VIN. 5 of them (1XP, 1NP, 2NP, 2XP and 3BP) appeared in the 149 Peterbilt VINs Native Base sampled from FMCSA roadside inspection records; the rest are registered but were not seen in that sample.
Peterbilt's manufacturer registration with NHTSA carries no GVWR range. In the 149 Peterbilt VINs Native Base sampled from FMCSA roadside inspections, the most common class vPIC returned was Class 8: 33,001 lb and above (14,969 kg and above) (129 units). The sample is capped, so read the mix as indicative of the make, not a count of its fleet.
The 10th character of the VIN is the model year code. On 1XPBD49X4RD610198, a Peterbilt truck-tractor from FMCSA's inspection file, position 10 is "R" and NHTSA vPIC decodes it as 2024. vPIC notes that the year code repeats every 30 years and this filing did not settle which cycle applies, so confirm the year on the certification label. The free Peterbilt VIN decoder at the top of this page returns the same fields for any Peterbilt VIN.
The same record, page by page. The truck and trailer VIN decoder takes any VIN and explains what a decode returns; each page below carries one manufacturer's WMI codes, VIN pattern, GVWR classes and worked decodes.
Checking the same unit against the FMCSA crash file? The VIN crash check takes the same 17 characters.
We wire the same vPIC decode into an agency's AMS so a fleet list comes back as ACORD 129 rows, with the GVWR class checked against the prior dec page on every Peterbilt unit.
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