SAFER is FMCSA's public website. Search by USDOT number to see a carrier's legal name, status, number of trucks and drivers, operating authority and inspection history. Every lead in Trucking OS has an "FMCSA snapshot" button that opens it.

Check before a free check: is the USDOT number active? How many trucks? Any out-of-service inspections? That tells you what to ask about.

Data on SAFER is self-reported and can lag, so confirm with the owner.