HaulerCheck · https://haulercheck.com/carrier/4248740-sljohnson/ · Checked 2026-10-19 00:20 UTC · Census and inspections Oct 18, 2026 · Authority and insurance: Last known · FMCSA snapshot May 14, 2026
SLJOHNSON
Doing business as SLJOHNSONINCSL JOHNSON PLUMBING& HEATING
Do not book until these are resolved · 1 signal
How risk signals workAt least one fact in the FMCSA record should stop a booking until it is cleared up. Confirm the current record on Motus first; it is not a finding of wrongdoing. Authority and insurance are last known from May 14, 2026.
- Operating authority is not authorized (last known)Without active authority the company may not haul or broker interstate freight for hire.
- Registration (MCS-150) last updated 2 years agoFleet size and contact details on the registration may be out of date.
No cargo cover filed with FMCSA
Not a live check. FMCSA has not published a Motus record for this carrier, so authority and insurance show the last known status from May 14, 2026. Confirm on Motus ↗ before booking.
What to verify next
- Confirm authority and insurance on the official Motus record ↗: our copy is the last known status from May 14, 2026. Safety record: SAFER ↗.
- Call back on the number on file, (301) 330-0628, not a number from an email or load board.
- Check that the MC number you were given is MC1646571.
- Ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Insurance on file
No insurance filings were found in the public FMCSA data for this carrier.
Roadside inspections Oct 18, 2024 – Oct 18, 2026
0 of 1 · Maryland avg 20.7%
1 of 1 · Maryland avg 9.4%
Most recent inspection
| Date | State | Level | Violations | Out of service |
|---|---|---|---|---|
| Dec 23, 2025 | MD | 1 | 4 | Yes |
How these rates are calculated
Period: Oct 18, 2024 – Oct 18, 2026. Vehicle rate = vehicle inspections with a vehicle out-of-service order ÷ vehicle inspections (levels 1, 2, 5 and 6). Driver rate uses levels 1, 2, 3 and 6. The Maryland average covers 42,318 vehicle and 51,664 driver inspections of all Maryland-based carriers in this period. It mixes every type of operation, so compare with care; rates based on a handful of inspections say little. FMCSA's own SMS measures are weighted differently: SMS profile ↗ · SAFER snapshot ↗
Violations in FMCSA's SMS last 24 months
3 violations counted in FMCSA's Safety Measurement System (SMS), 1 of them serious enough to put the driver or vehicle out of service.
Why is this different from the 4 violations above?
The inspections section's number counts every violation written on the inspection reports in our Oct 18, 2024 – Oct 18, 2026 window. The SMS count comes from FMCSA's own monthly SMS snapshot, which uses its own 24-month window and only the violations it scores. Both are FMCSA figures; they measure different things.
| Category (FMCSA BASIC) | Violations | Out of service | Share | Maryland share |
|---|---|---|---|---|
| Vehicle Maintenance | 2 | 0 | 66.7% | 71.4% |
| Driver Fitness | 1 | 1 | 33.3% | 6.6% |
3 most frequent violations
| Violation | Times | Out of service |
|---|---|---|
| Medical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency Medical Certificate · Driver Fitness · code 39141APC | 1 | 1 |
| Operating a CMV without documentation of a periodic inspection Inspection Reports · Vehicle Maintenance · code 39617CPI | 1 | 0 |
| Lighting - Stop lamps - Any inoperative. Lighting · Vehicle Maintenance · code 3939ALSLI | 1 | 0 |
Source: FMCSA SMS violation file, inspections in the last 24 months, published Oct 18, 2026. "Share" is this company's mix of violations; the Maryland column is the mix across all Maryland-based carriers, so you can see which kinds of problems stand out. A high count partly reflects fleet size and how often trucks are inspected.
Crashes Oct 18, 2024 – Oct 18, 2026
No reportable crashes in this period.
Company details FMCSA census · Oct 18, 2026
| USDOT number | 4248740 |
|---|---|
| MC / docket | MC1646571 |
| Legal name | SLJOHNSON |
| DBA name | SLJOHNSONINCSL JOHNSON PLUMBING& HEATING |
| Operation | Intrastate (Non-Hazmat) |
| Business type | — |
| Power units | 1 |
| Drivers | 1 |
| Hazmat | No |
| Safety rating | Not rated (no compliance review on record) |
| USDOT number added | Jun 3, 2024 · 2 years ago |
| Last MCS-150 update | Jun 3, 2024 |
Cargo carried
General FreightHousehold GoodsBuilding MaterialsGarbage/RefuseConstructionWater Well
Questions about SLJOHNSON
What does SLJOHNSON's operating authority allow?
FMCSA records show no active operating authority for SLJOHNSON (MC1646571), so it may not haul regulated interstate freight for hire or broker loads under these dockets.
Which information about SLJOHNSON is old or missing?
Operating authority is the last known status from the FMCSA snapshot of May 14, 2026, not a current check. No insurance filings were found in the public data. There are too few vehicle inspections in the last 24 months to judge the out-of-service rate. FMCSA has not issued a safety rating, which means no compliance review is on record, not that the carrier is unsafe. The MCS-150 was last updated Jun 3, 2024, so fleet size and contact details may be out of date.
What should I verify before booking SLJOHNSON?
Confirm the authority and insurance on the Motus record for USDOT 4248740. Call the company back on the phone number on file, (301) 330-0628, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC1646571, and ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Other trucking companies in Rockville, MD →
Company details from the FMCSA Company Census File (Oct 18, 2026). Inspections and crashes from FMCSA MCMIS files. About our data · Report an error on this page (how corrections work).
Page generated 2026-10-19 00:20 UTC.