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DOT 2550662 is operated by CALIFORNIA MATERIALS INC out of Stockton, CA. 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: ACTIVE. "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: active. We mark a carrier "lapsed" when the most recent cancellation date is in the past with no superseding policy.
CALIFORNIA MATERIALS INC was last inspected on 2026-08-13. We've recorded 34 inspections in the trailing 12 months.
CALIFORNIA MATERIALS INC is registered as 888547. Many brokers reference carriers by MC; both identifiers resolve to the same carrier record.
Save CALIFORNIA MATERIALS INC to your history
Step-by-step checklist for vetting any motor carrier before tendering a load — operating authority, insurance, safety scores, inspection history, and identity flags.
Decoder ring for the free public carrier lookups every broker can reach — what each field means, what is missing, and how to read authority and inspection data without misinterpreting it.
Equipment, lane footprint, insurance timeline, and fraud signals on one screen.
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.
Offer with confidence — current authority and clean operations.
power units (MCS-150)
distinct VINs in inspections
34 inspections, 12mo
most recent roadside record
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).
Is this your business? Sign up with your FMCSA-on-file email (e***s@c***s.com) to claim this profile →
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.
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.
Current reported fleet · as of Jan 2026. A trend line appears once a second filing is on record.
NATIONAL INTERSTATE INSURANCE COMPANY · policy VPP 4900099-00
These are our estimates from local roadside-inspection history; FMCSA hasn't published measures 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.
No active fraud-risk signals contribute to this score.