MCS-150 (biennial update)
The MCS-150 is the Motor Carrier Identification Report: the registration form behind a carrier's USDOT record. It carries the company's self-reported profile, including legal name, addresses, contact details, fleet size (power units), and annual mileage. Federal rule (49 CFR 390.19T) requires every carrier to refile it at least every 24 months, whether or not anything changed.
Why the filing date matters
The MCS-150 date is the freshness stamp on everything the form contains. Every self-reported field on the record (fleet size, mileage, contact info) is at least as old as the last filing, and every fleetfax report shows when that was. FMCSA paused enforcement of the filing deadline in 2026 during its registration system transition, so fleetfax does not currently flag an overdue filing.
The public record carries the date the form was filed, not a date for each field. A fresh MCS-150 date means the carrier refiled the form on that date; it does not certify which individual fields changed or were verified.
Self-reported vs observed
Fleet size on the MCS-150 is what the carrier says about itself. The inspection record is what the road says. When the two disagree, the inspection record is the better guide to what is actually on the road; fleetfax shows the self-reported count as what the carrier filed, not as ground truth. See how old inspected trucks are nationwide →
fleetfax reads public FMCSA data and is not affiliated with FMCSA or the U.S. Department of Transportation. This page explains terminology; it is not legal advice.
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