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DOT 1899521 is operated by SPECIALTY BUILDERS SUPPLY INC out of Harwich, MA. This profile shows verified operating authority, current insurance, observed equipment, and recent inspection activity joined into one card so brokers can verify the carrier in one tab.
Operating authority is verified against the live public registry and refreshed daily. Current status: unknown. "active" means the carrier is authorized to operate; "inactive" or "out-of-service" indicates the carrier should not be hauling.
Liability and cargo insurance status is drawn from the latest filings on record. Current status: unknown. We mark a carrier "lapsed" when the most recent cancellation date is in the past with no superseding policy.
SPECIALTY BUILDERS SUPPLY INC was last inspected on 2026-06-22. We've recorded 2 inspections in the trailing 12 months.
SPECIALTY BUILDERS SUPPLY INC does not have an MC number on file. Some carriers operate intrastate-only or under a private-carrier exemption and never apply for one.
See the 1 fraud signal on SPECIALTY BUILDERS SUPPLY INC— free signup
How double brokering works in 2026, recent fraud patterns, and a prevention checklist for freight brokers and shippers who want to stop the bleed.
Step-by-step checklist for vetting any motor carrier before tendering a load — operating authority, insurance, safety scores, inspection history, and identity flags.
Evidence, severity, and resolution notes for each signal on this carrier.
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Not enough reports yet
0 of 3 brokers needed before rates unlock
Rates stay locked below 3 contributing brokers so no single broker’s loads can be picked out of the aggregate.
Not enough broker-reported loads yet — this score unlocks as brokers report load outcomes. Aggregates appear once 3+ brokerages have reported on this carrier (0 loads from 0 brokerages so far).
Offer with confidence — current authority and clean operations.
power units (MCS-150)
distinct VINs in inspections
2 inspections, 12mo
most recent roadside record
No community reports for this carrier. Had a fraud or cargo-theft incident? Your report warns the whole network within minutes.
Community reports are submitted by broker workspaces and are NOT verified by KnowHaul. New reporters are human-moderated; 3+ corroborating workspaces feed a capped penalty into the fraud risk score. Named in a report that's wrong? Email admin@knowhaul.com and a human will review it.
Not enough claim reports yet
0 of 3 brokers needed before claims history unlocks
Claims stay locked below 3 contributing brokers so no single broker's claims can be picked out of the aggregate.
Aggregate rating unlocks at 3 reviewing workspaces — 0 so far. Individual reviews appear below as they're published.
No published reviews yet. Worked with this carrier? Your review starts the record.
| Filing date | Power units | Drivers |
|---|---|---|
| Oct 2025 | 14 | 13 |
| Apr 2026 | 14 | 13 |
Signals are precursor patterns, not proof of fraud. Verify before acting — and if a flag looks wrong, dispute it from its row.
Rows marked “Computed” are our estimate from local roadside-inspection history; FMCSA hasn't published a measure for this carrier yet (see #1000).
Crash Indicator and Hazmat Compliance percentiles aren't published in the public SMS downloads today (see #832).
Matched on equipment mix, fleet-size band, and home state.
4-unit fleet where 100% of VINs have no prior inspection history — likely paper-carrier shell.
No equipment signal — request a COI before tender.