Carrier profile · USDOT 948584 · MC-406494 · Updated Jun 13, 2026

DIAMOND CORING CO INC

15 power unitsRegional · 3 statesCHICAGO, IL50/100

CARRIER ACTIVEMC-406494 ACTIVE

Observed fleet · trailing 24 mo daily

15Power units

2 observed · MCS-150

1Trailers seen

Decoded · vPIC

12.7Avg age (yr)

2006–2018 · vPIC

Call dispatch(773) 978-5000

Click to see how we scored it

Load decision · FMCSA snapshot · Jun 13, 2026

Limited record

Not enough federal record to assess. Verify authority and insurance directly.

Active operating authorityInsurance on fileNot enough inspection history to rate

Watch · 1

Not enough inspection history to rate3 federal roadside inspections in the last 24 months. FMCSA itself will not score a carrier's vehicle or driver record on fewer than 5, and neither will we — verify authority, insurance and references directly before tendering.

In good standing · 3

Active operating authorityActive for-hire authority is on file with FMCSA.Insurance on fileBIPD (liability) insurance is on file with FMCSA.Established 25 yearsOperating authority has been on file since 2001.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo0.0%

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)$1M in force

FMCSA L&I

Vehicle OOS · 24-mo0.0%

Crashes · fatal

Clean · 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Asset-based

15 power units. Brokers price each fleet type apart.

Fleet age vs peersDecoding

—

Not yet decoded

Identity stabilityStable

25 yr unchanged

Same registration since 2001 — no chameleon / reincarnation signal.

Safety

3 inspections · 24 mo

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 0.0%24-mo cumulative

050%

Driver OOS 0.0%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 2 vehicle and 3 driver inspections over 24 months.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

3 inspections in the charted months · busiest month Oct '24 · 1

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Thin coverage

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.1 / unit·yr

thin signalabundant signal

Few roadside inspections for a 15-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.

Registered power units: 15
Inspections · 24 mo: 3
Annualized: ≈2 / yr
Coverage: ≈0.1 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving3 · 0 OOS
383.23 Operating without a valid CDLDriver Fitness2 · 2 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & insurance

Can they legally + adequately haul your load?

Operating authority· 49 CFR · per type

Operating authority

Common: None
Contract: Active
Broker: None

Insurance & bonds

BIPD / liability$1,000,000 in force

Cargo filing (census)Not recorded per census

Surety bond (census)Not recorded per census

Insurance adequacy· filed BIPD vs the $750K federal floor

$1M in forcegeneral-freight federal minimum

$750K floor

Filed BIPD coverage of $1M meets or exceeds the $750K federal minimum for general freight (49 CFR 387.9). Some commodities (hazmat, larger vehicles) require $1M–$5M — confirm against your load.

Insurance continuity· insurer · policy · lapses

$750K BIPD last filed · 6 insurers · 1 lapseCoverage lapse

Qbe’02–’08

Starr Liability’11–’15

Westfield’15–’20

Selective America’22–’25

2002200820142020now

Shorter eras are too brief to label at this scale — all 6 insurers are named in the list below.

BIPD in force — $1,000,000 · ARCH INSURANCE COMPANY · since Oct 2025

All 6 insurer eras · dates, limits, renewals

Insurer	Period	Limit	Renewals
SELECTIVE INSURANCE COMPANY OF AMERICA	Apr 2022 → Oct 2025	$750K	2
LIBERTY MUTUAL FIRE INSURANCE CO.	Mar 2020 → May 2022	$750K	2
WESTFIELD INSURANCE CO.	Mar 2015 → Mar 2020	$750K	1
STARR INDEMNITY & LIABILITY INSURANCE COMPANY	Mar 2011 → Mar 2015	$750K	1
AMERICAN STATES INSURANCE CO.	Nov 2008 → Apr 2009	$750K	1
QBE INSURANCE CORPORATION	Mar 2002 → Nov 2008	$750K	1

Explore full authority & insurance record

Equipment & fleet

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 15
Observed power (24 mo): 2
Trailers (towed): 1

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & lanes

Revealed by inspection density across 3 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional

revealed

States observed

US states

Inspections · 24 mo

ND busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

CHICAGO, IL

11800 S EWING AVE

Top corridor

ND ⇄ IL

ND 1 · IN 1 · IL 1

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & fraud

Affiliated entities & reincarnation signals · for review, not a verdict

No shared-identity links detected — no reincarnation flag, shared trucks, registration domain, or officer overlap with other carriers.

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.

Explore the carrier network & VIN cross-links

Identity & contact

FMCSA census + L&I dossier

Location

Physical address: 11800 S EWING AVE, CHICAGO, IL, 60617
Operation: Interstate

Contact

Phone: (773) 978-5000
Email: —

Registration

Officer: M. Zuccarelli
USDOT / docket: 948584 · MC-406494
First registered: Apr 19, 2001
Last MCS-150: Feb 23, 2026 · 170,351 mi (2025)
FMCSA safety rating: Not rated
D-U-N-S: 604903047

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

170,351

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

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Verification summaryAuthority, insurance, safety and identity facts for DIAMOND CORING CO INC.

DIAMOND CORING CO INC (USDOT 948584) is unrated by Vektor because the carrier's FMCSA record does not contain enough evidence for a safety score as of Jun 13, 2026.

The carrier holds active contract for-hire operating authority per FMCSA L&I as of Jun 13, 2026.

It has an active BIPD insurance filing with a $1,000,000 limit in force from ARCH INSURANCE COMPANY effective Oct 1, 2025 in FMCSA L&I's current snapshot as of Jun 13, 2026.

Its vehicle out-of-service rate was 0.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier received 3 roadside inspections in the last 24 months — 2 vehicle-level and 3 driver-level — across 3 states, according to FMCSA roadside-inspection data refreshed Jun 13, 2026.

The carrier has 0 reportable crashes in the last 24 months and 2 fatal crashes across the full FMCSA crash record available as of Jun 13, 2026.

It reports 15 power units and 15 drivers in its most recent MCS-150 filing dated Feb 23, 2026.

It has no FMCSA-assigned safety rating in the federal record refreshed Jun 13, 2026.

Frequently asked

What is DIAMOND CORING CO INC's USDOT number?

DIAMOND CORING CO INC's USDOT number is 948584, and its motor carrier number is MC-406494.

Is DIAMOND CORING CO INC authorized to operate?

As of Jun 13, 2026, DIAMOND CORING CO INC is active in the FMCSA register with common, contract, broker operating authority on file.

What is DIAMOND CORING CO INC's safety record?

DIAMOND CORING CO INC has a 0.0% vehicle out-of-service rate (national average 22.26%) across 4 roadside inspections, with 0 reportable crashes in the last 24 months, and is not currently rated by FMCSA. Vektor does not assign this carrier a safety score: 3 federal roadside inspections in the last 24 months. FMCSA itself will not score a carrier's vehicle or driver record on fewer than 5, and neither will we — verify authority, insurance and references directly before tendering.