The short answer
Kentucky trucks that never leave the state: the USDOT number with KY after it at any weight (except farm vehicles).
Kentucky is unusual: the intrastate carrier number is displayed as your USDOT number with the letters KY after it — for example USDOT 1234567 KY — alongside your carrier name, cut to the same legibility standard as the federal marking rule. KYU (the weight-distance tax licence, generally 60,000 lbs and over) is a separate credential with its own display rule: KYU licensees also show the KYU number on each taxed vehicle in the 49 CFR 390.21 manner (601 KAR 1:200 Section 4).
Trucks that cross a state line, or haul freight that starts or ends in another state, follow the federal rule instead: the USDOT number and your legal name when it is 10,001 lbs or more, carries placard-level hazmat, seats 9 or more for hire or seats 16 or more (49 CFR 390.21T(b)(2)).
Rules verified against the primary sources 2026-07-28, next review 2027-01-24. The full citation list is on our USDOT decals in Kentucky page and the 50-state rules table.
Eight Kentucky trucks, run through the checker
Each verdict below is what our free compliance checker returns for that truck using the verified Kentucky and federal rules. Where one changed fact flips the answer, we show the flip, because that is usually where Kentucky carriers get caught.
1. A 9,000-lb plumber's cargo van on Louisville service calls, Kentucky only
9,000 lbs GVWR · own tools and parts · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
2. A 14,000-lb GVWR service truck on landscaping jobs around Louisville, Kentucky only
14,000 lbs GVWR · own equipment · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
3. A 10,000-lb GVWR cutaway box van delivering furniture for pay, Louisville only
10,000 lbs GVWR · paid freight · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
4. A 33,000-lb tandem dump truck for a Lexington contractor, Kentucky only
33,000 lbs GVWR · paid hauling · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
5. A 40,000-lb grain truck on farm plates, Kentucky only
40,000 lbs GVWR · farm vehicle · Kentucky only
No verified rule
The verified Kentucky rule in our checker covers trucks that never leave the state at any weight (except farm vehicles). We have not verified a Kentucky rule for farm vehicles, and the federal rule only applies when a truck crosses state lines, so confirm with Kentucky Transportation Cabinet — Division of Motor Carriers or the FMCSA Kentucky Division, (502) 223-6779 before you leave this one unmarked.
Flip one fact: Take it off the farm exemption, by plating or by use, and it is marked like any other truck at this weight: the USDOT number with KY after it.
6. A 15-passenger hotel shuttle van in Louisville, no fare charged
15 seats including the driver · passengers, not for hire · 9,500 lbs GVWR · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
7. A 14,000-lb placarded propane bobtail, Kentucky only
14,000 lbs GVWR · placard-level hazmat · Kentucky only
USDOT number required
The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
8. A hotshot pickup and gooseneck running Louisville to Nashville loads
26,000 lbs combined · paid freight · interstate
USDOT number required
Because it crosses state lines, the federal marking rule applies: it is 26,000 pounds, over the 10,001-pound line. The checker returns the USDOT number and your legal name, both sides. On the door that reads: USDOT 1234567 · Your Company LLC. Because it hauls for hire across state lines, the checker also lists the MC number as commonly displayed but not required.
The checker weighs rating, registered and actual weight, operation, for-hire status, cargo, passenger count and farm status. It does not model axle count or vehicle type, so if your truck is unusual, confirm with Kentucky Transportation Cabinet — Division of Motor Carriers.
What goes on the door in Kentucky
- One marking, both sides of the power unit: USDOT 1234567 KY, which is the USDOT number with KY after it.
- No inch minimum in Kentucky. The legal standard is a color that contrasts with the truck and letters readable from 50 feet in daylight. We cut 2-inch letters, which clears that bar on any door.
- The KY after the number. Kentucky's rule is written for trucks that stay in Kentucky, and it reads USDOT 1234567 KY. The federal rule for trucks that cross state lines has no suffix, so a truck that does both is usually cut to the federal format; ask us if yours does.
Across the Kentucky line
The Kentucky line only matters while the truck stays home. One job in Tennessee, or one load that starts or ends out of state, makes it interstate commerce, and the federal 10,001-pound rule applies no matter where either state draws its own line. For a truck that works near the border it helps to know how the neighbors differ for their own in-state trucks:
- Illinois: the federal 10,001 pounds even in-state.
- Indiana: the federal 10,001 pounds even in-state.
- Missouri: for-hire carriers at any weight.
- Ohio: 10,001 pounds for hire and 26,001 for trucks hauling their own goods.
- Tennessee: 26,001 pounds.
- Virginia: the federal 10,001 pounds even in-state.
- West Virginia: any weight for hire and 10,001 pounds for trucks hauling their own goods.
Neighbor lines come from the same verified rule files the checker uses; each state's page has its citations.
Who enforces it in Kentucky
Door markings in Kentucky are the business of Kentucky Transportation Cabinet — Division of Motor Carriers. Questions about your registration or number: (502) 564-1257, agency site. The federal side, USDOT numbers and the MCS-150, is the FMCSA Kentucky Division: (502) 223-6779, MCKYOFF@dot.gov. A marking violation is written at the roadside and follows the carrier on the inspection report, which is why it is worth getting the two lines right the first time.
For the marking mistakes inspectors catch most often, see USDOT marking mistakes that fail roadside inspections.
Where the Kentucky rule comes from
- 601 KAR 1:005 Section 8 — 'Except for a farm-to-market agricultural transportation motor vehicle with a gross vehicle weight rating of 26,000 pounds or less, a motor carrier which…
- 601 KAR 1:005 — Kentucky adopts 49 C.F.R. Parts 40, 380-385, 390-397 by reference for intrastate operation, which is what carries the Part 390.21 marking manner (legible from…
- 601 KAR 1:040 — application/registration procedure for intrastate operating authority. Confirmed by full read that this section contains NO vehicle marking requirement; the…
- 49 CFR 390.21T — the federal marking rule for interstate carriers
Read in full and verified 2026-07-28; next scheduled review 2027-01-24.
Kentucky USDOT number FAQ
Does a 40,000-lb farm truck need a USDOT number in Kentucky?
The verified Kentucky rule in our checker covers trucks that never leave the state at any weight (except farm vehicles). We have not verified a Kentucky rule for farm vehicles, and the federal rule only applies when a truck crosses state lines, so confirm with Kentucky Transportation Cabinet — Division of Motor Carriers or the FMCSA Kentucky Division, (502) 223-6779 before you leave this one unmarked. Take it off the farm exemption, by plating or by use, and it is marked like any other truck at this weight: the USDOT number with KY after it.
Does a plumber's cargo van under 10,001 lbs need a USDOT number in Kentucky?
Yes. The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
Does a landscaper's 14,000-lb GVWR service truck at 14,000 lbs need a USDOT number in Kentucky?
Yes. The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
Does a 10,000-lb box truck hauling for pay need a USDOT number in Kentucky?
Yes. The Kentucky rule has no weight line: it reaches this truck simply because it is based in Kentucky and never leaves the state, and the only carve-out is for farm vehicles. The checker returns the USDOT number with KY after it, both sides. On the door that reads: USDOT 1234567 KY.
What exactly goes on the door in Kentucky?
One marking, both sides of the power unit: USDOT 1234567 KY, which is the USDOT number with KY after it. No inch minimum in Kentucky. The legal standard is a color that contrasts with the truck and letters readable from 50 feet in daylight. We cut 2-inch letters, which clears that bar on any door.
Get the Kentucky markings cut to spec
USDOT Number Decals
Your USDOT number cut to the 50-foot standard — set of 2, both sides.
$16+Full Compliance Kit
Legal name + USDOT + MC + GVW, all cut to match.
$54.95+Kentucky KYU Number Decal Set of 2
Cut to the Kentucky rule above.
from $18.95USDOT Decals in Kentucky
Every Kentucky truck decal we cut, with the Kentucky rule on one page.
from $16Not sure which truck above is yours? Run the free Kentucky check, seven questions, sources cited. Rules for other states are in our intrastate USDOT guide and the 50-state rules table.
General information, not legal advice. Fleet Decal Depot is a decal maker, not a government agency. Rules change; confirm with Kentucky Transportation Cabinet — Division of Motor Carriers and FMCSA before you operate.