Question 1

What is an MC docket number?

Accepted Answer

MC (Motor Carrier) is the FMCSA docket assigned to for-hire carriers, freight brokers, and freight forwarders who operate in interstate commerce. It's how the FMCSA tracks who has operating authority. MC numbers are up to 8 digits, usually prefixed "MC-". Brokers and shippers routinely verify a carrier by MC number before moving a load.

Question 2

What's the difference between MC, FF, and MX?

Accepted Answer

MC - Motor Carrier (domestic interstate for-hire carriers). FF - Freight Forwarder. MX - Mexican motor carrier operating in the US. All three are "docket numbers" issued by FMCSA on the same system. Our lookup handles all three.

Question 3

My new MC isn't showing up yet. Why?

Accepted Answer

New MC applications go through FMCSA processing after the OP-1 is filed - FMCSA lists 20-25 business days for new applicants, including a 10-day public protest window. Until processing closes and insurance + BOC-3 are on file, the docket exists in FMCSA's system but may not resolve via the public search API. If you filed recently and it's not showing, give it up to 3 business days after the processing window ends.

Question 4

I have an MC but it shows "Not Authorized". What does that mean?

Accepted Answer

The MC has been issued but at least one of: (a) insurance on file, (b) BOC-3 on file, (c) UCR registration, or (d) a form 2290 is missing or lapsed. Without all four, FMCSA flags the authority as not active. If you're the carrier, we can help get each one sorted.

Question 5

Why does an MC show "Revoked"?

Accepted Answer

Most common cause is a missed MCS-150 biennial update - FMCSA automatically revokes authority if you skip it. Insurance lapses are a close second. Revoked authorities can be reinstated; we handle reinstatement filings at fastreinstatementfiling.com.

Question 6

Can I look up an MC number that's been inactive for years?

Accepted Answer

Yes. FMCSA keeps historical records indefinitely. You'll see the old carrier's name and docket status (Revoked / Inactive), though the contact info may be stale.

Free MC Number Lookup

Common questions, plainly answered.

Skip the calculator. File now.