USDOT + MC Two-Line Decal

No. FMCSA states that no marking requirement exists for displaying an MC number, so the federal marking rule is about the name and USDOT number. Showing MC is allowed, because other identifying information may be displayed if it is not inconsistent with what the rule requires. Whether to add it is your call, so check what your lease or customers expect.

Search it on FMCSA's SAFER Company Snapshot, which accepts a USDOT number, an MC or MX number, or a company name. The Licensing and Insurance carrier search gives access to information about interstate for-hire carriers that have been granted authority or have applications pending. Copy the digits from there, not from memory.

The stack is built with USDOT first because the federal marking rule is about the USDOT number, while MC is optional extra information. If you would rather lead with MC, or put a phone number between the two, use the five-line set, where every line is free text. The USDOT number should still appear on the lettering if the marking rule applies to your vehicle.

In the door builder, each extra line such as GVW or a CA number adds $3. The builder prices line by line: $12.99 for the first number line and $4 for MC. A USDOT, MC and GVW decal therefore totals $19.99 at 12 inch width with black or white lettering in the builder, where wider widths and red or blue lettering add a little more. The four-line product page lists one price for every width.

The four-line stack is $22.99, which is $6 more, and it is built for USDOT, MC, a CA number and GVW. If you only need USDOT and MC, this stack makes a cleaner door. If you expect to add a state number or a weight line soon, ordering four lines now saves you a second order later.