DBA William C Diamond Plumbing and Heating
East Hanover, NJ
DOT 4030696MC 15227511 trucks1 drivers
Amber: PRIVATE CARRIER — NOT FOR-HIRE
FMCSA registers this company as a private carrier: it hauls its own goods. Private carriers don't need operating authority (an MC number) and don't file liability insurance with FMCSA, so neither shows here. It can't haul brokered or for-hire freight under this USDOT number.
Authority
Not Needed: Private Carrier
Hauls its own goods, so it needs no MC number. It can't haul brokered or for-hire freight under this number.
Insurance
Not Filed with FMCSA (Private Carrier)
Private carriers don't file liability insurance with FMCSA, so its records can't show it. Ask the company for a certificate of insurance.
Paperwork (MCS-150)
Paperwork Status: Up to Date
Last filed January 15, 2026. Next update due by June 2027.
Safety Rating
Not Checked
Not in this record. Run a live check for FMCSA's current rating.
From FMCSA's Safety Measurement System files, October 2024 to October 2026. Crash counts include crashes the carrier didn't cause. Out-of-service rates use only inspections that checked the driver or the vehicle.
Every roadside inspection in FMCSA's file for USDOT #4030696: when, where, and which vehicles (type, make, VIN) the inspector recorded.
THC compares FMCSA's files every night and keeps what changed. Tracked since October 30, 2026, last compared November 15, 2026.
No changes seen in the details THC tracks (status, name, phone, MC number, authority, insurance and bond filings) since October 30, 2026. That covers only what FMCSA's public files show.
Dates are when THC noticed the change in FMCSA's files, not when it happened, unless FMCSA's file gives the date. FMCSA's files can lag behind FMCSA's own systems. Check this record on FMCSA SAFER · Daily FMCSA change reports
USDOT 4030696 (William C Diamond) is active as a private carrier: it hauls its own goods, so it doesn't need operating authority. It can't haul brokered or for-hire freight under this number.
Our daily record doesn't include William C Diamond's safety rating. Run a free live check to see FMCSA's current rating. Most carriers are "Not Rated", which is normal: it means FMCSA has never done a full audit.
FMCSA's safety data for October 2024 to October 2026 shows no roadside inspections and no reportable crashes for William C Diamond. That's common for new or small companies; it isn't a safety rating.
Yes, it looks up to date. FMCSA's records show it was last filed January 15, 2026. The next update is due by June 30, 2027.
From public FMCSA records (the Company Census File, FMCSA's daily authority and insurance file and its monthly Safety Measurement System inspection and crash files). Trucking Help Center is not FMCSA and is not affiliated with this company. Records can change daily: run a live check, and confirm every load by calling the phone number on file. Is this your company and something looks wrong? Update your MCS-150 with FMCSA; our copy refreshes nightly.
Amber: PRIVATE CARRIER — NOT FOR-HIRE
FMCSA registers this company as a private carrier: it hauls its own goods. Private carriers don't need operating authority (an MC number) and don't file liability insurance with FMCSA, so neither shows here. It can't haul brokered or for-hire freight under this USDOT number.
Authority
Not Needed: Private Carrier
Hauls its own goods, so it needs no MC number. It can't haul brokered or for-hire freight under this number.
Insurance
Not Filed with FMCSA (Private Carrier)
Private carriers don't file liability insurance with FMCSA, so its records can't show it. Ask the company for a certificate of insurance.
Paperwork (MCS-150)
Paperwork Status: Up to Date
Last filed January 15, 2026. Next update due by June 2027.
Safety Rating
Not Checked
Not in this record. Run a live check for FMCSA's current rating.
