# DOT Open Data (FMCSA census, authority), free, Application token, GET /resource/az4n-8mr2.json: Company discovery API

> The Company Census File contains records for active, inactive, and pending entities registered with FMCSA.

DOT Open Data's Application token plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. DOT Open Data's docs list 1: Phones.
You get as many pages as you like.
In [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt), this plan scores 0.0 out of 100. DOT Open Data (FMCSA census, authority) ranks 82nd of 105 providers.
We rank 1,165 plans for company discovery APIs by price. Half the plans cost $0.525 or less per 1,000 companies. This plan and 170 others tie for the lowest price per 1,000 companies of the 1,165 plans. [See the best free company discovery API plan.](https://datacircle.dev/best-company-discovery-api.txt)
[PeopleSearch.im's $5 pack](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) covers any number of companies. PeopleSearch.im's $5 pack costs less up front than StackScan's $189 monthly plan.
[GetProspect](https://datacircle.dev/company-discovery-apis/getprospect/49-monthly/llms.txt), [Hunter](https://datacircle.dev/company-discovery-apis/hunter/49-monthly-starter-post-discover/llms.txt) and [PeopleSearch.im](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) are the best company discovery API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-az4n-8mr2-json
- [Company discovery API: the best of 100+ providers compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://dev.socrata.com/docs/app-tokens.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `GET https://data.transportation.gov/resource/az4n-8mr2.json`
- API key: with the plan, on https://dev.socrata.com/docs/app-tokens.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://dev.socrata.com/foundry/data.transportation.gov/az4n-8mr2?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: DOT Open Data (FMCSA census, authority) (https://data.transportation.gov?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 8%
- Phones: ✓

## Score

- Overall score: 0.0. We give it 0 overall because its Accuracy score is 0.
- Price score: 100
- Accuracy score: 0
- Cost to get started score: 77
- Bundle score: 0
- Performance score: 0. We could not measure how fast this provider answers a call, so we count it as 0.

## Price

- $ per 1,000 companies: $0.00
- Per: page of 1,000
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Most per search: no limit
- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: The Company Census File contains records for active, inactive, and pending entities registered with FMCSA.

## Data

- Countries: United States
- Keep data: no limit
- Use data: Each dataset's Rights: "public" (Common Core metadata). Socrata Terms of Use: "While using the Services, you will not: [...] Collect or store personal data about other users or individuals, Use any computer code, data mining software, "robot," "bot," "spider," "scraper" or other automatic device, or program, algorithm or methodology having similar processes or functionality, or any manual process, to monitor or copy any of the Web pages, data or content found or accessed through the Services, [...] Display, distribute, license, perform, publish, reproduce, duplicate, copy, create derivative works from, modify, sell, resell, exploit, transfer, or transmit for any commercial purposes, all or any portion of the Services or use in-line or other linking to display content from the Services without Tyler’s permission, [...]"

## Plan

- Pay: $0
- Enough for: no limit

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: $where, $select, $limit, $offset, $order
- Method: GET
- Path: /resource/az4n-8mr2.json

## About the plan

- Plan: Application token
- Who can get it: anyone who registers an application token in a Socrata profile

## The 147 fields the plan's answer can hold

MCS-150 date, record added date, status code, USDOT number, Dun & Bradstreet number, physical OMC region, safety investigation territory, carrier operation, business organization ID, MCS-150 mileage, MCS-150 mileage year, MCS-151 mileage, total cars, MCS-150 update code ID, prior revoke flag, prior revoke USDOT number, phone, fax, cell phone, company officer 1, company officer 2, business organization description, truck units, power units, bus units, fleet size, review ID, recordable crash rate, mailing nationality indicator, physical nationality indicator, physical barrio, mailing barrio, carship, docket 1 prefix, docket 1 number, docket 2 prefix, docket 2 number, docket 3 prefix, docket 3 number, point number, total intrastate drivers, MCSIP step, MCSIP date, hazardous materials indicator, interstate beyond 100 miles, interstate within 100 miles, intrastate beyond 100 miles, intrastate within 100 miles, total CDL drivers, total drivers, average drivers leased per month, operation classification, legal name, DBA name, physical street, physical city, physical country, physical state, physical ZIP code, physical county, mailing street, mailing state, mailing city, mailing country, mailing ZIP code, mailing county, mailing undeliverable date, total interstate drivers, email address, review type, review date, safety rating, safety rating date, physical address undeliverable, cargo general freight, cargo household goods, cargo metal sheets, coils and rolls, cargo motor vehicles, cargo drive away and tow away, cargo logs, poles, beams and lumber, cargo building materials, cargo mobile homes, cargo machinery and large objects, cargo fresh produce, cargo liquids and gases, cargo intermodal containers, cargo passengers, cargo oilfield equipment, cargo livestock, cargo grain, feed and hay, cargo coal and coke, cargo meat, cargo garbage, refuse and trash, cargo U.S. mail, cargo chemicals, cargo dry bulk commodities, cargo refrigerated food, cargo beverages, cargo paper products, cargo utilities, cargo farm supplies, cargo construction, cargo water well, cargo other, cargo other description, owned trucks, owned truck tractors, owned trailers, owned motorcoaches, owned school buses of 1 to 8 passengers, owned school buses of 9 to 15 passengers, owned school buses of 16 or more passengers, owned buses of 16 or more passengers, owned vans of 1 to 8 passengers, owned vans of 9 to 15 passengers, owned limousines of 1 to 8 passengers, owned limousines of 9 to 15 passengers, owned limousines of 16 or more passengers, term leased trucks, term leased truck tractors, term leased trailers, term leased motorcoaches, term leased school buses of 1 to 8 passengers, term leased school buses of 9 to 15 passengers, term leased school buses of 16 or more passengers, term leased buses of 16 or more passengers, term leased vans of 1 to 8 passengers, term leased vans of 9 to 15 passengers, term leased limousines of 1 to 8 passengers, term leased limousines of 9 to 15 passengers, term leased limousines of 16 or more passengers, trip leased trucks, trip leased truck tractors, trip leased trailers, trip leased motorcoaches, trip leased school buses of 1 to 8 passengers, trip leased school buses of 9 to 15 passengers, trip leased school buses of 16 or more passengers, trip leased buses of 16 or more passengers, trip leased vans of 1 to 8 passengers, trip leased vans of 9 to 15 passengers, trip leased limousines of 1 to 8 passengers, trip leased limousines of 9 to 15 passengers, trip leased limousines of 16 or more passengers, docket 1 status code, docket 2 status code, docket 3 status code

## DOT Open Data's plans (2)

- [DOT Open Data (FMCSA census, authority), free, Application token, GET /resource/az4n-8mr2.json](https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-az4n-8mr2-json/llms.txt): $0.00 per 1,000, 8% complete
- [DOT Open Data (FMCSA census, authority), free, No application token, GET /resource/az4n-8mr2.json](https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-no-application-token-get-resource-az4n-8mr2-json/llms.txt): $0.00 per 1,000, 8% complete

## DOT Open Data's calls (2)

- `GET /resource/az4n-8mr2.json`: [DOT Open Data (FMCSA census, authority), free, Application token, GET /resource/az4n-8mr2.json](https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-az4n-8mr2-json/llms.txt)
- `GET /resource/inys-ebih.json`: [DOT Open Data (FMCSA census, authority), free, Application token, GET /resource/inys-ebih.json](https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-inys-ebih-json/llms.txt)

## DOT Open Data's APIs (2)

- [DOT Open Data (FMCSA census, authority): business verification API pricing, 2 plans, GET /resource/az4n-8mr2.json](https://datacircle.dev/business-verification-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-az4n-8mr2-json/llms.txt)
- [DOT Open Data (FMCSA census, authority): business verification API pricing, 2 plans, GET /resource/inys-ebih.json](https://datacircle.dev/business-verification-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-inys-ebih-json/llms.txt)
- [DOT Open Data (FMCSA census, authority): company discovery API pricing, 2 plans, GET /resource/az4n-8mr2.json](https://datacircle.dev/company-discovery-apis/dot-open-data-fmcsa-census-authority/free-application-token-get-resource-az4n-8mr2-json/llms.txt)

## DOT Open Data (FMCSA census, authority): company discovery API alternatives

- [GetProspect, free](https://datacircle.dev/company-discovery-apis/getprospect/free/llms.txt): $0.00 per 1,000, 62% complete, stored
- [Hunter, free, POST /discover](https://datacircle.dev/company-discovery-apis/hunter/free-post-discover/llms.txt): $0.00 per 1,000, 54% complete, stored
- [PeopleSearch.im, free](https://datacircle.dev/company-discovery-apis/peoplesearch-im/free/llms.txt): $0.00 per 1,000, 38% complete, stored
- [AnVendor, free, POST /v1/leads/search](https://datacircle.dev/company-discovery-apis/anvendor/free-post-v1-leads-search/llms.txt): $0.00 per 1,000, 23% complete, stored
- [datos.gov.co, free, With an app token](https://datacircle.dev/company-discovery-apis/datos-gov-co/free-with-an-app-token/llms.txt): $0.00 per 1,000, 8% complete, 1 month

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://data.transportation.gov/api/catalog/v1?q=FMCSA%20census&limit=20&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://data.transportation.gov/api/views/az4n-8mr2.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/app-tokens.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/endpoints.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/queries/limit.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/queries/offset.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/queries/order.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/queries/select.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/queries/where.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://dev.socrata.com/docs/response-codes.html?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://www.tylertech.com/terms/socrata-terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing