Official sources
The FMCSA Company Census File (az4n-8mr2) supplies active USDOT registrations, contact information, physical addresses, fleets and cargo. Motus AuthHist (yu5v-wbh6) supplies authority-grant events; Motus Carrier (inys-ebih) adds authority context. All are downloaded from data.transportation.gov through its official open-data API.
One carrier, one USDOT
The full database contains one row per active USDOT number. Corporate groups with multiple USDOT numbers remain separate. Packs use physical US address states; the national pack is exactly the 50 states plus DC. Active registration does not prove current operations.
Contact checks
Emails are checked for syntax and obvious placeholders, not by SMTP or inbox verification. Shared emails and likely service-provider addresses are flagged. Phone formats are normalized; a phone may be personal or wireless. Missing fields stay empty.