USDOT number vs MC number: which one you need and what each does

The statute is 49 U.S.C. 31134(a): "An employer or person may operate a commercial motor vehicle in interstate commerce only if the employer or person is registered by the Secretary under this section and receives a USDOT number."

The regulation that issues it is 49 CFR 390.19T. Paragraph (a)(1) says who files: "A U.S.-, Canada-, Mexico-, or non-North America-domiciled motor carrier conducting operations in interstate commerce must file a Motor Carrier Identification Report, Form MCS-150." Paragraph (h)(1) is the issuance itself: "Upon receipt and processing of the form described in paragraph (a) of this section, FMCSA will issue the motor carrier or intermodal equipment provider an identification number (USDOT Number)."

Two things in that text matter more than they look:

• "Motor carrier" includes private carriers. The definition at § 390.5T reads: "Motor carrier means a for-hire motor carrier or a private motor carrier." A landscaper hauling its own equipment across a state line in a 12,000-pound truck is a motor carrier under this part and needs a USDOT number, even though it never hauls for hire.
• The trigger is the vehicle, not the business. § 390.5T defines a commercial motor vehicle as one used on a highway in interstate commerce that has a gross vehicle weight rating, gross combination weight rating, or actual weight "of 4,536 kg (10,001 pounds) or more, whichever is greater"; or is designed or used to carry more than 8 passengers for compensation; or more than 15 passengers not for compensation; or carries hazardous materials "in a quantity requiring placarding."

Intrastate-only operations are outside § 390.19T(a)(1). The one federal intrastate case is § 390.19T(a)(2): a carrier "conducting operations in intrastate commerce and requiring a Safety Permit under 49 CFR part 385, subpart E, must file a Combined Motor Carrier Identification Report and HM Permit Application, Form MCS-150B." Whether your state requires a USDOT number for intrastate-only operation is a matter of state law, which we do not list here. § 390.19T(i) separately lets a carrier that registers its vehicles in a state participating in the PRISM program satisfy the federal filing through the state.

There are two parallel versions of the registration rule, and only one is in effect. § 390.200T is operative. § 390.201, the Unified Registration System version that would have folded everything into Form MCSA-1 for all registrants, was "suspended indefinitely, effective Nov. 17, 2023" (88 FR 80184). Anything you read that quotes § 390.201 as current is quoting suspended text.

The number is free. The operative fee schedule at § 360.3T(f) has no line item for issuing a USDOT number; see what a new authority actually costs. It is also not permanent by default: § 390.19T(b)(2) requires a refiled MCS-150 "Every 24 months," and (b)(4) makes a carrier that misses the update "subject to the penalties prescribed in 49 U.S.C. 521(b)(2)(B) or 49 U.S.C. 14901(a), as appropriate, and deactivation of its USDOT Number." Our MCS-150 checker computes your month and year.

How we verified this: we read the full XML of 49 CFR part 390 from the eCFR API for the text in effect 2026-09-01, retrieved 2026-09-14, and the statute at 49 U.S.C. 31134 from the Legal Information Institute the same day.

49 U.S.C. 13901(a) sets the requirement: "A person may provide transportation as a motor carrier subject to jurisdiction under subchapter I of chapter 135 or service as a freight forwarder subject to jurisdiction under subchapter III of such chapter, or service as a broker for transportation subject to jurisdiction under subchapter I of such chapter only if the person is registered under this chapter to provide such transportation or service."

Paragraph (b) is where the number itself comes from. Under § 13901(b)(1), when FMCSA registers a person "the Secretary shall issue a distinctive registration number to the person for each such authority to provide transportation or service for which the person is registered," and under (b)(2) that number "shall include an indicator of the type of transportation or service for which the registration number is issued." That indicator is the prefix. The operative application rule, 49 CFR 365.106T(b), names the three: "Motor Carrier (MC), Mexico owned or controlled (MX) or Freight Forwarder (FF) number." FMCSA's public insurance data dictionary records the docket in the same shape, "MC0000000000, FF0000000000, MX0000000000." Brokers are issued MC dockets too.

The order of operations is written into the registration statute. 49 U.S.C. 13902(a)(1) allows FMCSA to register a motor carrier "only if the Secretary determines that the person" meets a list of conditions, and item (B) on that list is that the applicant "has been issued a USDOT number under section 31134." You cannot hold an MC number without a USDOT number. The reverse is common.

Operating authority is granted by type, and the types do not substitute for each other:

• § 365.101T(a): "certificates and permits to operate as a motor common or contract carrier of property or passengers."
• § 365.101T(b): "permits to operate as a freight forwarder."
• § 365.101T(d): "licenses to operate as a broker of motor vehicle transportation."

A carrier that wants to arrange loads for other carriers needs a second registration. § 13902(a)(6): "A motor carrier may not broker transportation services unless the motor carrier has registered as a broker under this chapter." The mirror rule for brokers is § 13904(d)(1), and for freight forwarders § 13903(d).

How we verified this: 49 U.S.C. 13901, 13902, 13903 and 13904 retrieved 2026-09-14 from the Legal Information Institute; 49 CFR part 365 from the eCFR API, text in effect 2026-09-01. Part 365 carries two parallel sets of sections; §§ 365.101, 365.105, 365.106, 365.107 and 365.109 are suspended and the "T" versions are operative, which is what we quote.

Authority attaches to for-hire, economically regulated carriage. Three definitions decide whether that is you.

For hire. 49 U.S.C. 13102(14): "The term 'motor carrier' means a person providing motor vehicle transportation for compensation." § 13102(15) defines the other side: a "motor private carrier" is "a person, other than a motor carrier, transporting property by motor vehicle when" the person "is the owner, lessee, or bailee of the property being transported" and "the property is being transported for sale, lease, rent, or bailment or to further a commercial enterprise." A private carrier needs no operating authority and no MC number. It still needs a USDOT number if it runs commercial motor vehicles interstate (section 1).

Exempt commodities. 49 U.S.C. 13506(a) lists transportation over which "Neither the Secretary nor the Board has jurisdiction." The line most relevant to trucking is (a)(6), which exempts "transportation by motor vehicle of (A) ordinary livestock; (B) agricultural or horticultural commodities (other than manufactured products thereof); (C) commodities listed as exempt in the Commodity List incorporated in ruling numbered 107, March 19, 1958, Bureau of Motor Carriers, Interstate Commerce Commission, other than frozen fruits, frozen berries, frozen vegetables, cocoa beans, coffee beans, tea, bananas, or hemp, or wool imported from a foreign country, wool tops and noils, or wool waste (carded, spun, woven, or knitted); (D) cooked or uncooked fish" with stated exceptions, and "(E) livestock and poultry feed and agricultural seeds and plants" when moved to a site of agricultural production. The same subsection also exempts, among others, "a motor vehicle used only to distribute newspapers" in (a)(7).

What "exempt" does not exempt you from. § 390.5T: "Exempt motor carrier means a person engaged in transportation exempt from economic regulation by the Federal Motor Carrier Safety Administration (FMCSA) under 49 U.S.C. 13506. 'Exempt motor carriers' are subject to the safety regulations set forth in this subchapter." An exempt hauler of fresh produce across state lines needs a USDOT number, an MCS-150, a driver qualification file and the rest of parts 382 through 399. It also needs the minimum liability insurance in § 387.9, because § 387.3(a) applies that subpart to "for-hire motor carriers operating motor vehicles transporting property in interstate or foreign commerce" with no carve-out for economic exemption. What it does not need is the MC docket, the $300 fee, or the insurance filing under part 387 subpart C.

Paying the $300 starts a clock rather than ending one. § 365.109T(a)(5) requires evidence of financial responsibility "by filing within 20 days from the date an application notice is published in the FMCSA Register," naming the forms: "Form BMC-91 or 91X or BMC 82 surety bond" for bodily injury and property damage, "Form BMC-84—Surety bond or Form BMC-85—trust fund agreement" for property brokers, and "Form BMC 34 or BMC 83 surety bond" for household goods cargo. § 365.109T(a)(6) adds the process agent: "Applicants also must submit Form BOC-3—designation of legal process agents—within 20 days from the date an application notice is published in the FMCSA Register."

Under § 365.109T(b), "A summary of the application will be published as a preliminary grant of authority in the FMCSA Register to give notice to the public in case anyone wishes to oppose the application." A rejected application can be appealed "within 10 days of the date of the letter of rejection" (§ 365.111T(a)). Both of the 20-day filings are the subject of their own guides: BOC-3 process agents and the BMC insurance filings.

The idea that MC numbers are being retired in favor of the USDOT number is real, old, and not yet in effect. Here is the documented sequence.

• 2013. The Unified Registration System final rule (78 FR 52608, August 23, 2013) stated: "The URS will discontinue issuance of MC, MX, and FF Numbers to those entities who register with FMCSA. However, today's rule will not require motor carriers to remove the obsolete numbers from their vehicles." It explained that applicants would be "identified solely by USDOT Number."
• 2017. FMCSA's own 2026 notice recounts what happened next: "there were substantial delays, and subsequent phases have not been rolled out to date. On January 17, 2017, FMCSA issued a final rule titled 'Unified Registration System; Suspension of Effectiveness,' which indefinitely suspended URS effectiveness dates for existing registrants (82 FR 5292)." That is why the "T" sections exist and why § 365.106T(b) still defines MC, MX and FF numbers today.
• 2026. On April 29, 2026 FMCSA published "Availability of Motus, FMCSA's New Registration System" (91 FR 23144). Phase I "was released on December 8, 2025" for process-agent and insurance filers; Phase II, "planned for the second quarter of 2026," opens the system to all registrants. On the numbers, the notice is explicit: "Stakeholders expressed concerns in three core areas: the introduction of safety registration, the elimination of the Motor Carrier (MC) and Freight Forwarder (FF) Docket Numbers, and changes to the process for the Form BOC-3 to be filed with the Agency. In response to stakeholder feedback, the Phase II release of Motus will not include the implementation of safety registration, the elimination of MC/FF numbers, or changes to the Form BOC-3 filing process. FMCSA will take a measured approach to implement these changes in later releases."

So as of the text in effect today, both numbers exist, both are issued, and the docket prefix is still the "indicator of the type" § 13901(b)(2) requires. FMCSA's public data already flows from Motus: the insurance feed we read carries filings received on 2026-09-14 under dockets with the MC prefix. Plan on carrying both numbers, and expect the elimination, when it comes, to arrive by Federal Register notice rather than quietly.

How we verified this: the 2013 rule and the April 29, 2026 notice were retrieved 2026-09-14 from the Federal Register's full-text service. FMCSA's own web pages return HTTP 403 to automated retrieval, so nothing here is sourced from fmcsa.dot.gov.

The carrier lookup shows the two numbers in the first row of a record: the USDOT number from FMCSA's census file, and the docket as prefix plus digits with a status badge. What the combination tells you:

• USDOT number active, no docket. The carrier is registered for safety oversight only. It is either a private carrier, an exempt-commodity hauler, or a for-hire carrier that has never applied. Do not tender it a regulated load.
• Docket present, status pending. FMCSA's authority history records these with the reason "Initial Status." The application has been filed, but the 20-day insurance and BOC-3 filings and the protest period have not finished. There is no authority to operate under yet.
• Docket active. The operating authority table in the lookup lists common, contract and broker authority separately, what the carrier is authorized to carry (property, passengers, household goods), the minimum bodily injury and property damage coverage FMCSA requires for it, and the amount actually on file. Compare the last two.
• Docket inactive. The authority history section gives the reason FMCSA recorded, such as "Voluntary Suspension," "Revoked," or an involuntary suspension for a lapsed insurance or BOC-3 filing. The authority changes page lists the most recent grants and losses across all carriers from the same feed.

The MCS-150 date on the same record tells you whether the USDOT side is current. A biennial update more than two years old on an otherwise active record is the first sign a carrier is drifting toward deactivation under § 390.19T(b)(4).

• This is not legal advice, and CarrierStat is not affiliated with FMCSA or any government agency. Whether a specific commodity is exempt under 49 U.S.C. 13506 and Administrative Ruling 107 is a question with a long case history; confirm before you rely on it.
• State intrastate registration is set by each state. We print none of it.
• Passenger carriers have additional registration paths under 49 U.S.C. 13902(b) and appendix A to part 387 that this page does not walk through.
• Suspended sections are labeled. §§ 365.101–365.119, § 390.201 and its subpart E neighbors, and § 360.3 all have suspended and operative twins. We quote the operative "T" text and flag suspended text wherever it appears.

49 U.S.C. 31134, 13901, 13902, 13903, 13904, 13102, 13506 — retrieved 2026-09-14 from the Legal Information Institute at law.cornell.edu.

49 CFR part 390 — § 390.5T definitions, § 390.19T (MCS-150, issuance and biennial update), § 390.200T (operative) and § 390.201 (suspended indefinitely at 88 FR 80184, Nov. 17, 2023). eCFR API, text in effect 2026-09-01, retrieved 2026-09-14; human-readable at ecfr.gov.

49 CFR part 365 — §§ 365.101T, 365.106T, 365.109T, 365.111T. Same snapshot; human-readable at ecfr.gov.

49 CFR 360.3T — fee schedule (f)(1), the per-type rule (d)(1), and non-refundability (c). Same snapshot; ecfr.gov.

49 CFR 387.3 and 387.9 — applicability of the liability minimums to for-hire carriers regardless of economic exemption. Same snapshot.

78 FR 52608 (Unified Registration System, Aug. 23, 2013) and 91 FR 23144 (Availability of Motus, Apr. 29, 2026) — retrieved 2026-09-14 from federalregister.gov.

FMCSA Motus insurance feed data dictionary (data.transportation.gov, dataset c5y8-a4uz) — docket number format. Retrieved 2026-09-14.

Carrier authority & insurance lookup — both numbers, authority status and insurance on file for any USDOT or MC number.

What a new authority actually costs — every federally fixed fee, with the $300 per-type rule.

BOC-3 process agents — the second 20-day filing after your application is published.

BMC-91, BMC-91X, BMC-34 and the broker bond — the first 20-day filing.

MCS-150 biennial update checker — the month and year your USDOT number comes due.

Authority changes — recent grants, suspensions and revocations from FMCSA's Motus feed.

Carrier data by state and UCR 2026 fee calculator.