By Haul Handbook editorial team· Updated Sep 28, 2026
The Arizona intrastate rule
Federal USDOT registration depends on the vehicle and operation. The rows below show what Arizona requires for carriers operating inside the state. Our state DOT number requirements table holds the same answer for every state. A field reading "Not confirmed" means this guide has no verified figure for that field.
ADOT's Motor Carrier Services page requires a USDOT number of a business that operates a vehicle or combination over 26,000 pounds in intrastate commerce (over 10,000 pounds in interstate commerce), and of any for-hire carrier. A.R.S. 28-5201(1) draws the same intrastate line for the commercial motor vehicle definition (26,001 pounds or more, gross vehicle weight rating or gross weight, whichever is greater) and adds any bus or school bus, any vehicle that transports passengers for hire with a design capacity of nine or more persons, and any vehicle carrying hazardous materials that must be placarded under 49 CFR 172.504, regardless of weight.
An Arizona-only carrier is an intrastate motor carrier. It does not schedule the federal new-entrant safety audit, and ADOT asks it to call 602.712.4388 to confirm that the correct operating authority is recorded under its USDOT company profile.
Arizona carrier-number record
Arizona runs no state carrier number program and no intrastate operating authority, so no USDOT prerequisite gates a state credential. The identifier ADOT asks an Arizona-only carrier to keep correct is the federal USDOT number and the operating authority recorded under that profile.
Where an Arizona carrier enrolls
Registration goes to the agency that issues each credential; the federal process is covered step by step in our guide to getting a USDOT number. Filing services resell these same applications, so the rows below name the direct channel first.
Create a user profile, complete identity verification, and create a company account in Motus to apply for a USDOT number and the registrations your operation needs. Claim your existing USDOT record in Motus using the company official’s Login.gov email, then manage registrations or apply for additional authority. See the Motus account guide before opening or claiming your record.
- USDOT number
- Directly with FMCSA. ADOT's Motor Carrier Services page lists the MCS-150 (or MCS-150B) as the application package for the USDOT number and sends carriers to FMCSA to apply; no Arizona agency issues the number. (registration site)
ADOT's answer to a carrier that runs only in Arizona is operational, not a credential: it is an intrastate motor carrier, it skips the new-entrant audit, and it confirms its operating authority by phone.
Arizona's IFTA/IRP application asks for the USDOT number and an active MC number before Specialized Registration Services issues either credential, so an interstate carrier needs both in hand first.
Once a number is active, anyone can pull the public record behind it; our DOT number lookup guide shows how to read that snapshot the way brokers and enforcement do, and the MC number lookup reads the live record back for a number you type in.
The same number carries your safety history. Every roadside inspection written against it feeds the CSA percentiles a broker's vetting platform reads after it checks your authority and insurance, and a violation recorded in error is corrected through DataQs, not by the state agency that issued the credential above.
The state registration triggers behind it
These are the operations that pull a carrier into Arizona's own motor carrier registration, where the DOT number rules above attach. The full credential, fees, and insurance filings live on the Arizona intrastate authority page.
Where the number fits in the Arizona launch
Registration numbers come early: they exist before insurance binds and before the first load. For the full order of operations, from entity to authority to plates, work through start a trucking company in Arizona, and keep the Arizona trucking hub handy for the rest of the state's credentials.