CarrierTruth is a free online service for looking up U.S. trucking companies using a company name, USDOT number, or phone number. It republishes company-level information from public Federal Motor Carrier Safety Administration (FMCSA) registries and adds daily verification and change tracking. Search results and carrier profiles cover details such as operating authority, registration status, fleet information, addresses, and business contact history. Users can also search a phone number to check whether it appears as a carrier’s registered business line.

A key feature is the dated history of registry changes, including authority and status updates, fleet changes, and contact or address revisions, with source files identified for recorded events. CarrierTruth also provides carrier browsing by state and a regularly updated list of newly granted operating authorities. Its basic information is free to browse without an account. Brokers and shippers can join a waitlist for a planned carrier-monitoring service, which is intended to email users when registry details change.