Loading…
DOT 1396146 is operated by SIERRA INSULATION CO INC out of Auburn, 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: 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.
SIERRA INSULATION CO INC was last inspected on 2026-05-27. We've recorded 3 inspections in the trailing 12 months.
SIERRA INSULATION CO 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.
Save SIERRA INSULATION CO INC to your history
Is this your business? Sign up with your FMCSA-on-file email (l***s@s***o.com) to claim this profile →
Consider with verification — at least one signal needs review.
power units (MCS-150)
distinct VINs in inspections
3 inspections, 12mo
most recent roadside record
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 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).
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.
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 Apr 2026. A trend line appears once a second filing is on record.
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).
No active fraud-risk signals contribute to this score.
Matched on equipment mix, fleet-size band, and home state.
No equipment signal — request a COI before tender.