TX DOT Number Lookup: TxDMV Certificate Search Guide

A TX DOT number lookup helps freight brokers, dispatchers, and shippers verify whether a trucking company has the Texas operating credentials required for its work. To check a Texas motor carrier, search the Texas Department of Motor Vehicles (TxDMV) Truck Stop portal, confirm its certificate status, and review its USDOT registration and safety records through FMCSA.

One detail often causes confusion: a Texas motor carrier certificate and a federal USDOT number are not the same thing.

A carrier operating within Texas may need state operating authority, while a business hauling freight across state lines may need federal operating authority. Some carriers need both, depending on how they operate.

For freight brokers, finding a number is only the beginning. The next step is confirming that it belongs to the company offering the truck, that the required authority is active, and that the carrier meets the applicable insurance and safety requirements.

This guide explains how to perform a Texas DOT number lookup, where to find official registration information, and which details deserve attention before booking a load.

What Is a TX DOT Number and Who Needs One?

A TX DOT number is an older term commonly used for a Texas motor carrier operating credential. Today, the official state credential is known as a TxDMV certificate number, issued by the Texas Department of Motor Vehicles.

It identifies a business registered to conduct covered intrastate motor carrier operations in Texas.

This is different from the USDOT number issued through the Federal Motor Carrier Safety Administration (FMCSA).

A USDOT number identifies a registered transportation business in federal records. A TxDMV certificate establishes Texas intrastate operating authority for a business subject to the state's motor carrier registration requirements.

A company may need both credentials.

For example, a trucking company operating qualifying commercial vehicles between Houston and San Antonio may need a TxDMV certificate and a USDOT number.

Another carrier transporting freight from Houston to Louisiana may need federal interstate operating authority.

The distinction matters when a broker is reviewing a company that operates both locally and across state lines.

An active state certificate does not automatically authorize every interstate transportation service. Likewise, having a USDOT number does not establish that a company holds all required operating authority.

Intrastate vs. Interstate Trucking in Texas

Before checking a carrier's operating authority, identify the type of transportation it will perform.

Intrastate commerce generally involves transportation conducted entirely within Texas that is not part of a continuous interstate movement.

For example, a Texas manufacturer may hire a motor carrier to transport equipment from a facility in Austin to a customer in Dallas.

If the shipment originates and ends within Texas and is not part of a larger interstate movement, it may qualify as intrastate commerce.

Interstate commerce includes transportation across state boundaries and can also include movements conducted entirely within one state when they form part of continuous interstate transportation.

A truck hauling freight from Dallas to Oklahoma City is an obvious interstate example.

The less obvious cases require closer attention.

Suppose products arrive from another state at a Texas distribution center and are then transported to a predetermined final destination elsewhere in Texas.

Even if the final truck never leaves Texas, that movement may still be interstate commerce.

The shipment's overall transportation arrangement matters, not simply the route taken by one truck.

This distinction affects which operating authority the brokerage should review.

When Texas motor carrier registration is required

TxDMV identifies several categories of intrastate motor carrier operations that require state registration.

They include:

Heavy commercial vehicles: Vehicles or vehicle combinations with a gross weight, registered weight, or gross weight rating exceeding 26,000 pounds.
Hazardous materials transportation: Vehicles transporting hazardous materials in quantities requiring placards.
Certain farm vehicles: Farm vehicles with a gross weight, registered weight, or gross weight rating of 48,000 pounds or more.
Passenger transportation: Vehicles designed to transport more than 15 passengers, including the driver.
Commercial school buses: Certain commercial school bus operations.
Household goods movers: Businesses transporting household goods for compensation, regardless of vehicle weight.

The requirements depend on the operation and applicable exceptions.

Not every commercial vehicle traveling on a Texas highway needs the same TxDMV credential.

For example, a small delivery vehicle carrying ordinary goods may be subject to different registration requirements from a heavy commercial tractor-trailer.

A broker should evaluate the actual vehicle and transportation activity rather than assume that all commercial trucks are regulated identically.

TxDMV Motor Carrier Credentials Explained

Texas has several transportation agencies, and their responsibilities are different.

The Texas Department of Motor Vehicles (TxDMV) administers state motor carrier credentialing and issues Texas intrastate operating authority.

The Texas Department of Transportation (TxDOT) primarily manages transportation infrastructure, including highways, construction, and roadway planning.

The Texas Department of Public Safety (DPS) has a separate role in commercial vehicle enforcement and related safety activities.

This explains why the term "TxDOT number" can be misleading.

Although the older term is still used in the trucking industry, the current Texas motor carrier credentialing process is administered by TxDMV.

What Is a TxDMV Certificate?

A TxDMV certificate identifies a registered motor carrier's Texas intrastate operating authority.

The certificate is associated with the registered legal entity.

TxDMV offers registration periods that include seven calendar days, 90 days, one year, and two years, depending on the applicable registration category.

For brokers, the most important questions are whether the certificate belongs to the company being considered and whether its status supports the proposed operation.

An expired or inactive certificate should not be treated as current authority.

A certificate assigned to another company cannot simply be used because that business has a similar name.

What Is TxMCCS?

TxMCCS stands for the Texas Motor Carrier Credentialing System.

It is the current online system for Texas motor carrier credentialing and account management.

Motor carriers use TxMCCS to apply for operating authority, update company information, manage certificates, and review insurance filings.

The system replaced the previous Motor Carrier Credentialing System and eLINC.

However, freight brokers generally do not need access to a carrier's private TxMCCS account to verify public credential information.

TxDMV provides a public Truck Stop Motor Carrier Lookup that can be used without a carrier login.

That is the appropriate starting point for a routine Texas certificate search.

How to Perform a TX DOT Number Lookup

A Texas DOT number lookup should establish two things.

First, identify the correct business in the Texas motor carrier records.

Second, determine whether the company's credentials and available compliance information support the proposed transportation.

The process is easier when the carrier provides its TxDMV certificate number and USDOT number before onboarding.

Step-by-Step Search via Texas State Portals

Step 1: Collect the Carrier's Identifying Information

Start with the company's registered legal name.

Ask for the TxDMV certificate number, USDOT number, and applicable Motor Carrier (MC) number.

Also collect the company's physical business address and any DBA, or Doing Business As, name.

A useful intake record includes:

Full legal business name.
DBA name, if applicable.
TxDMV certificate number.
USDOT number.
Relevant MC number.
Physical business address.
Established telephone number and email address.

This information helps distinguish carriers with similar names.

A company may advertise using a short trade name while its official records identify a longer legal entity.

That difference can be legitimate, but the relationship must be verified.

Step 2: Open the Official TxDMV Truck Stop Portal

Use the Texas Truck Stop Motor Carrier Lookup.

The public portal allows users to search motor carrier records without registering for a private carrier account.

Choose the appropriate search type and enter the available information.

The portal supports searching by TxDMV certificate number and other carrier identifying information.

When searching by name or another text field, follow the portal's minimum search-character requirements.

A certificate number is generally more useful than a broad company-name search because it narrows the possible matches.

Step 3: Review the Search Results

Look for the registered business.

The search results can provide information such as:

Company name.
Certificate number.
Physical address.
Mailing address.
USDOT number.
Other available identifying details.

Compare the result with the carrier packet.

For example, if a company claims to operate from Fort Worth but the selected record belongs to a similarly named business in another city, do not assume the records refer to the same carrier.

Ask for clarification.

The goal is to connect the company offering the transportation with the correct state registration.

Step 4: Open the Certificate Details

Select the matching business to review its credential record.

Look for the certificate number, certificate type, current status, and available validity information.

An active status is useful evidence that the company has a current state credential.

However, the certificate must also be relevant to the company's actual operation.

Do not use an active record belonging to one legal business to approve another.

If the certificate information conflicts with the carrier's documents, resolve the discrepancy before moving forward.

Step 5: Review the Insurance Filing Information

TxDMV Truck Stop provides insurance filing information associated with registered carriers.

Depending on the record, details may include the insurer, policy type, filing status, coverage type, amount, and effective date.

Some records show previous filings alongside current ones.

Pay attention to the status.

An entry marked active is different from a filing that has been replaced.

A previous insurance filing should not be treated as proof of current coverage.

Step 6: Cross-Check the Federal USDOT Record

After confirming the Texas registration, review the company using its USDOT number.

FMCSA's SAFER Company Snapshot provides a public view of registered carrier information and available safety records.

Check whether the legal name and business address align with the state record.

A difference may reflect an ordinary business update, but an unexplained mismatch deserves attention.

If federal interstate operating authority is required for the proposed shipment, review that authority separately.

Step 7: Record the Results

Keep a concise verification record.

At minimum, it should identify the carrier, the numbers checked, the relevant authority status, the insurance information reviewed, and the date.

The next dispatcher should be able to understand what was checked without reconstructing the entire process.

For repeat bookings, the record also provides a useful baseline for spotting changes.

Checking Active Operating Authority and Insurance

Operating authority and insurance should be checked for the actual service the carrier will perform.

Texas Intrastate Authority

For a motor carrier subject to Texas intrastate registration, check its TxDMV certificate.

Confirm that the certificate belongs to the selected legal entity and that its status supports the proposed operation.

If the record is inactive or the company details do not match, investigate before tendering the freight.

Federal Interstate Authority

A USDOT number is not automatically permission to transport property for hire across state lines.

For operations requiring federal interstate authority, review the relevant FMCSA operating authority information.

An MC number may help identify an existing authority record when applicable.

The key is confirming the current authority associated with the registered business.

Also distinguish the motor carrier physically transporting the goods from the broker arranging the shipment.

The broker's authority does not replace any authority required of the motor carrier.

Texas Insurance Filing Requirements

TxDMV requires applicable insurance filings from carriers subject to its registration rules.

For example, Form E is associated with commercial automobile liability insurance filings.

Forms H and I are associated with applicable household goods cargo insurance filings.

The carrier's actual insurance obligations depend on its operating activity.

A brokerage should review the relevant state filing rather than assume every carrier requires identical coverage.

For a practical insurance review:

Confirm the registered company matches the insured business.
Check the current filing status.
Review the relevant insurance type.
Compare available policy information with the documents supplied.
Confirm coverage requirements for the proposed freight.
Resolve material discrepancies with an independently verified insurance source.

A Certificate of Insurance (COI) can provide useful policy information.

However, it does not guarantee that every shipment, commodity, or potential loss is covered.

A carrier transporting ordinary general freight may have different insurance considerations from one moving specialized or higher-value cargo.

For unusual loads, ask the appropriate insurance source to clarify coverage rather than making assumptions from a certificate alone.

When Do Texas Carriers Also Need a USDOT Number?

A carrier applying for Texas intrastate operating authority through TxDMV must have a valid USDOT number. TxDMV instructs businesses operating exclusively within Texas to register their USDOT operation as intrastate.

That federal identifier is required as part of the Texas credentialing process.

However, a USDOT number is different from state or federal operating authority.

The USDOT number identifies the business in federal registration and safety records.

The TxDMV certificate provides applicable Texas intrastate operating authority.

Federal operating authority may be required for interstate for-hire transportation.

These distinctions matter because a carrier can have valid identifiers without holding every credential needed for a proposed shipment.

Texas Intrastate Operations

A trucking company conducting qualifying intrastate transportation may need:

A valid USDOT number.
Appropriate TxDMV intrastate operating authority.
Required Texas insurance filings.
Other vehicle and operational credentials applicable to its work.

The exact requirements depend on the vehicle and transportation activity.

Texas Interstate Operations

A motor carrier conducting interstate transportation may need:

USDOT registration.
Applicable federal operating authority.
Required federal insurance or financial responsibility filings.
Other credentials associated with its interstate operation.

Some operations, including certain private carrier activities, are treated differently from interstate for-hire property transportation.

That is why identifying the company's operating classification is part of the review.

Carriers Performing Both Types of Transportation

Some Texas-based carriers conduct local deliveries and interstate freight movements.

A company may handle intrastate work during the week and accept loads going into neighboring states.

The broker should verify the authority relevant to each proposed shipment.

Do not assume that a company's ability to perform intrastate transportation automatically establishes its eligibility for interstate for-hire freight.

Texas Carrier Credentials Compared

Credential or Record	Responsible Agency	Purpose	What to Verify
TxDMV Certificate	Texas Department of Motor Vehicles	Texas intrastate motor carrier operating authority.	Registered company, certificate number, and status.
USDOT Number	Federal Motor Carrier Safety Administration	Identifies registered businesses in federal motor carrier records.	Legal name, registration details, and available safety information.
Federal Operating Authority	Federal Motor Carrier Safety Administration	Authorizes covered interstate for-hire operations.	Appropriate authority and its current status.
Texas Insurance Filing	TxDMV credentialing records	Documents applicable state insurance filing requirements.	Insurer, filing status, coverage type, and relevant details.
Federal Insurance Filing	FMCSA records	Documents applicable federal financial responsibility filings.	Whether the filing meets the relevant federal requirement.
Carrier Safety Records	FMCSA and enforcement agencies	Provide inspection, crash, violation, and safety oversight information.	Available ratings, safety history, and patterns requiring attention.

The table illustrates why one lookup cannot answer every question.

A Texas certificate can help establish state authority, but it does not replace a safety review.

Similarly, a USDOT number can connect a company to federal records without establishing that the person offering the truck is authorized to represent it.

Why the Type of Freight Movement Matters

A Texas pickup and delivery address do not always mean a shipment is intrastate commerce.

Consider a shipment of machinery produced in Houston and delivered to a customer in Austin.

If the transportation begins and ends in Texas and is not part of a continuous interstate movement, intrastate rules may apply.

Now consider equipment originating in another state, temporarily stopping at a Texas warehouse, and continuing to its predetermined destination in Austin.

The final trucking leg may occur entirely within Texas.

Even so, that leg may remain part of interstate commerce.

A broker evaluating the carrier should understand the broader shipment arrangement rather than relying only on the pickup and delivery addresses.

Before assigning the load, clarify the origin of the transportation, its intended destination, and whether the proposed movement is part of continuing interstate transportation.

This helps prevent the wrong authority record from being used to support the booking decision.

Key Safety and Compliance Metrics to Review

An active Texas motor carrier certificate is useful, but it does not establish the carrier's complete safety or compliance history.

The next step is to review available information about inspections, crashes, operating authority, and federal safety oversight.

For freight brokers, these records should support judgment, not replace it.

A single statistic can be misleading when separated from the number of inspections, the reporting period, or the carrier's operating history.

Inspection History, Crash Data, and Out-of-Service Rates

Roadside Inspection History

Commercial motor vehicles may be inspected by authorized enforcement officers.

These inspections can reveal driver and vehicle compliance issues.

Common areas include:

Brake system condition.
Tire and wheel defects.
Lighting and other vehicle equipment.
Driver qualifications.
Hours-of-service compliance.
Other applicable commercial vehicle requirements.

Look for patterns rather than treating every finding identically.

For example, repeated brake-related violations may suggest a maintenance concern that deserves further review.

A single documented defect does not necessarily establish a continuing problem.

When examining a carrier's history, consider both the type and frequency of violations.

Out-of-Service Rates

An out-of-service rate reflects the share of relevant inspections resulting in an out-of-service finding.

The rate can help identify issues, but the number of inspections is just as important.

A carrier with very few inspections may show a high percentage after only a small number of findings.

A large operation with more inspection activity may have a different statistical profile.

Comparing percentages without considering inspection volume can lead to incorrect conclusions.

Review the actual inspection counts and the issues behind the out-of-service findings.

Crash History

FMCSA maintains records of certain reportable crashes involving motor carriers.

The SAFER Company Snapshot generally displays inspection and crash information for a rolling 24-month reporting period.

Crash records are useful for understanding reported events, but they do not automatically establish that the motor carrier caused them.

A carrier can be involved in a qualifying crash without being responsible for the incident.

Avoid treating a crash count as a final safety judgment.

Instead, consider the available context and whether other information points to concerns requiring follow-up.

Formal Carrier Safety Ratings

FMCSA may assign formal carrier safety ratings through applicable safety fitness evaluations.

The ratings include:

Satisfactory: The carrier received a formal rating indicating sufficient safety management controls under the applicable evaluation.
Conditional: The evaluation identified inadequate safety management controls.
Unsatisfactory: The evaluation found safety management controls inadequate under the applicable safety fitness standard.

A carrier can also have no assigned formal rating.

Not Rated does not mean Satisfactory.

It means the record does not show an assigned formal rating.

This is particularly relevant when reviewing a carrier with limited operating history.

A missing rating should not be presented as proof of good safety performance.

Carrier Safety Measurement System (SMS)

The FMCSA Safety Measurement System (SMS) uses available inspection, violation, and crash-related information to support federal safety oversight.

SMS includes Behavior Analysis and Safety Improvement Categories, known as BASICs.

These categories address areas such as unsafe driving, hours-of-service compliance, and vehicle maintenance.

Publicly available SMS measures can help brokers identify issues that warrant further examination.

However, SMS percentiles are not formal federal safety ratings or direct predictions of a carrier's future crash risk.

The underlying data and reporting period need to be considered.

Not all SMS measures and supporting details are publicly available.

Check How Current the Information Is

Government records are not all updated at the same time.

For example, FMCSA registration information and inspection or crash summaries may follow different refresh schedules.

Record when you performed the search.

For repeat carriers, update time-sensitive checks according to the brokerage's procedures.

An insurance filing, authority record, or business contact that was accurate during an earlier booking may not still be current.

Best Practices for Vetting Texas Commercial Carriers

Carrier vetting works best when employees follow a repeatable process.

A dispatcher should be able to identify the correct business, review the relevant credentials, and document the decision without searching through unrelated email threads.

The process should also distinguish between information that can be reused and records that need an updated review.

1. Confirm the Legal Motor Carrier

Start with the registered legal name.

Compare the name with the USDOT number, TxDMV certificate, and available carrier documents.

If the company uses a DBA, confirm the relationship between the trade name and the registered business.

Do not approve a company solely because its trade name looks familiar.

Similar company names are common in transportation.

2. Check the Applicable TxDMV Certificate

For an operation requiring Texas intrastate authority, use TxDMV Truck Stop.

Confirm the certificate number, legal entity, and current status.

If the record is inactive or does not match the carrier, investigate before booking freight.

A certificate belonging to another legal entity is not sufficient merely because the businesses share an address or similar name.

3. Perform a Federal DOT and MC Lookup

Review the USDOT registration.

Compare the business details with the state record.

When federal operating authority is relevant, examine the applicable authority information.

Carrier90 provides a free DOT and MC number lookup platform for brokers and dispatchers who need access to carrier identifiers and available FMCSA-derived records.

These checks can help establish the correct company before an authority or safety review continues.

4. Match Authority to the Proposed Load

Determine whether the operation is intrastate or interstate.

Then confirm the authority applicable to that transportation.

A Texas certificate does not automatically authorize covered interstate transportation.

A federal USDOT number does not replace the need for applicable operating authority.

The credentials must support the actual service being offered.

5. Review the Insurance Information

Check the relevant Texas or federal insurance filing.

Confirm the carrier identity, filing status, and policy information relevant to the shipment.

If the carrier supplies a COI, compare the named insured and policy details.

When needed, verify coverage with the insurer or authorized agent using independently established contact information.

This is especially useful for specialized cargo or unusual contract requirements.

6. Read Safety Records in Context

Review the formal carrier safety rating, if assigned.

Look at available inspection and crash information.

Pay attention to repeated violations and the size of the underlying data set.

A small number of inspections may not provide enough information for a confident comparison.

Do not assume that a carrier with no formal safety rating has passed a safety evaluation.

7. Verify Unfamiliar Booking Contacts

Carrier impersonation is a separate issue from whether a trucking company has valid credentials.

A fraudster may use a legitimate carrier's USDOT number and business name.

A dispatcher should be cautious when an unfamiliar contact offers a truck under an existing carrier identity.

Unexpected changes in email addresses, telephone numbers, pickup contacts, or payment instructions deserve independent verification.

Use a trusted contact method rather than relying entirely on the information provided in the questionable message.

8. Investigate Unexplained Business Changes

Companies can legitimately change their names, locations, or ownership structures.

Those changes are not automatically suspicious.

However, unexplained differences across registration records, insurance documents, and contact details should be resolved before the brokerage relies on the information.

Record the issue and how it was addressed.

9. Maintain a Clear Approval Record

For each carrier, keep enough information to show why the company was approved.

A useful record includes:

Registered legal name and DBA.
Verified USDOT number.
TxDMV certificate number, if applicable.
Relevant federal operating authority information.
Insurance verification details.
Available safety findings reviewed.
Date of the review.
Employee responsible for the decision.
Outstanding issues and their resolution.

This helps the next dispatcher understand what was checked.

It also prevents one employee from relying on a previous approval without knowing whether anything has changed.

10. Recheck Time-Sensitive Information

Carrier vetting should not end after the first shipment.

A company may update its authority, insurance, business address, or contact information.

For repeat carriers, preserve the established identity record but refresh information that can affect the next booking.

A carrier that completed several previous loads without problems should not automatically be considered approved for every future operation.

Common Mistakes to Avoid

Confusing TxDOT and TxDMV

The older term TxDOT number still appears in trucking conversations.

For the current Texas motor carrier certificate lookup, use TxDMV Truck Stop.

TxDOT is not the agency administering this public motor carrier credential lookup.

Checking Only the USDOT Number

A USDOT number identifies the company in federal registration records.

It does not establish every operating authority required for the shipment.

Check the relevant Texas or federal authority separately.

Treating an Active Certificate as a Complete Safety Approval

An active state certificate is not a substitute for reviewing carrier identity, insurance information, and available safety records.

Each check answers a different question.

Relying Only on a Certificate of Insurance

A COI can provide useful insurance details.

However, the document itself does not guarantee coverage for every cargo type or possible loss.

Verify unclear information with an appropriate insurance source.

Assuming Every Texas-Only Route Is Intrastate Commerce

A truck may remain within Texas while carrying freight that is part of a larger interstate movement.

The shipment's full transportation arrangement determines the relevant classification.

Overlooking Carrier Impersonation

A legitimate USDOT number does not prove that every person using it is authorized to represent the carrier.

Unexpected changes to established contact details should be confirmed independently.

Texas Carrier Vetting Checklist

Verification Item	What to Confirm	Why It Matters
Legal business identity	Registered name, DBA, and identifying numbers.	Helps prevent incorrect carrier matches.
TxDMV certificate	Applicable state operating authority and current certificate status.	Helps establish Texas intrastate credentialing.
USDOT number	Federal registration information and matching business details.	Connects the carrier to federal registration and safety records.
Federal operating authority	Appropriate current authority for the proposed transportation.	Helps establish eligibility for covered interstate operations.
Insurance	Relevant filing status, named insured, and coverage requirements.	Identifies missing or inconsistent insurance information.
Safety information	Available ratings, inspection history, and crash records.	Supports review of potential safety concerns.
Carrier contacts	Independently verified communication details where appropriate.	Helps reduce carrier impersonation risks.
Approval history	Review date, responsible employee, and unresolved exceptions.	Preserves an understandable record for repeat bookings.

Frequently Asked Questions About Texas DOT Numbers

How do I look up a Texas DOT number?

Use the public TxDMV Truck Stop Motor Carrier Lookup and search using the carrier's identifying information, preferably its TxDMV certificate number. Open the matching record to review the legal business name, certificate status, and available insurance filings. Use the carrier's USDOT number to examine the separate FMCSA record.

What is the difference between a TxDMV certificate and a USDOT number?

A TxDMV certificate identifies Texas intrastate operating authority for a registered motor carrier. A USDOT number identifies the business in FMCSA registration and safety records. Texas carriers applying for TxDMV operating authority must obtain a USDOT number, but the two credentials serve different purposes.

Do Texas intrastate motor carriers need a federal DOT number?

Motor carriers applying for Texas intrastate operating authority through TxDMV must have a valid USDOT number. TxDMV instructs companies operating exclusively within Texas to register their USDOT operation as intrastate. Whether a particular business must register with TxDMV depends on its vehicle characteristics, transportation activities, and applicable requirements.

Where can I check if a Texas carrier's insurance is active?

TxDMV Truck Stop provides publicly available insurance filing information for registered Texas motor carriers. The carrier can also review its filings through its TxMCCS account, while applicable federal filings can be checked through FMCSA records. For shipment-specific coverage questions, confirm the relevant details with the insurer or authorized agent.

How can freight brokers vet commercial trucks operating in Texas?

Start by identifying the legal motor carrier and checking its USDOT number and applicable TxDMV certificate. Review the authority required for the shipment, relevant insurance information, and available safety records. Also verify unfamiliar booking contacts independently and document material discrepancies before assigning freight.

A TX DOT number lookup is an essential starting point for verifying motor carriers operating in Texas. It helps brokers identify the registered business and investigate whether the company holds the state credentials relevant to its transportation activities.

A complete carrier review also considers federal registration, operating authority, insurance, and available safety information.

For freight brokers, dispatchers, and shippers who need a convenient way to investigate carriers, Carrier90 provides free DOT and MC number lookup capabilities, FMCSA-derived carrier safety data, and verification tools that support better-informed booking decisions.