---
title: "What is MC number?"
description: "The docket number issued with interstate for-hire operating authority."
canonical: https://mydotcheck.com/glossary/mc-number
last_updated: 2026-10-21
---

# What is MC number?

The docket number issued with interstate for-hire operating authority.

An MC number is assigned when FMCSA grants operating authority to transport regulated commodities for hire across state lines. Brokers and freight forwarders get one as well.

Authority stays active only while required insurance and a BOC-3 remain on file. Check the authority status, not just whether a number exists.

## Learn more

-   [MC Number Lookup and MC Checker: Find Any Carrier Free](/mc-number-lookup)
-   [DOT Number vs MC Number: Which One Do You Need?](/dot-number-vs-mc-number)

Check your DOT number

---
Canonical URL: https://mydotcheck.com/glossary/mc-number
Title: What is MC number?