Carrier profile · USDOT 4013855 · MC-1512057 · Updated Sep 6, 2026

G4 Tank Lines LLC

56 power unitsavg 12.7 yrMulti-region · 8 statesDENVER, CO100/100

CARRIER ACTIVEMC-1512057 ACTIVEHAZMAT

Observed fleet · trailing 24 mo daily

56Power units

35 observed · MCS-150

29Trailers seen

Decoded · vPIC

12.7Avg age (yr)

1997–2026 · vPIC

Call dispatch(720) 210-8794 Email dispatchggrossi@g4tanklines.com

Click to see how we scored it

Load decision · FMCSA snapshot · Sep 6, 2026

Clear to load

Active authority and a clean federal record. No blocking issues found.

Watch · 0

Nothing flagged.

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.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 67 inspections.

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)On file

FMCSA L&I

Vehicle OOS · 24-mo17.4%

▼ 22.26% nat'l

Crashes · fatal

1 in 24 mo

USDOT registration

yr registered

Active for-hire

Insurance (BIPD)On file

FMCSA L&I

Vehicle OOS · 24-mo17.4%

▼ 22.26% nat'l

Crashes · fatal

1 in 24 mo

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

Fleet typeIdentity

Small fleet

56 power units. Brokers price each fleet type apart.

Fleet age vs peersOlder

12.7 yr

Model years 1997–2026 · peer benchmark unavailable.

Identity stabilityStable

3 yr unchanged

Same registration since 2023 — no chameleon / reincarnation signal.

Safety

53 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 17.4%24-mo cumulative

050%nat'l 22.26%

Driver OOS 0.0%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 46 vehicle and 53 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

15.4% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 3.3 pts across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

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

53 inspections in the charted months · busiest month Jan '26 · 7

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.

Expected band

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.5 / unit·yr

thin signalabundant signal

Roadside-inspection volume is about what you'd expect for a 56-unit fleet — enough signal to read the safety record, though not a heavy sample.

Registered power units: 56
Inspections · 24 mo: 53
Annualized: ≈27 / yr
Coverage: ≈0.5 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 Driving16 · 0 OOS
393.45 Brake tubing / hose defectsVehicle Maintenance8 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance7 · 0 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance6 · 3 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance6 · 6 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance5 · 0 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance5 · 0 OOS
172.328 Other violationOther5 · 0 OOS
395.24 ELD — record edits / dataHOS Compliance4 · 0 OOS
393.47 Brake actuators / linings / componentsVehicle Maintenance4 · 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: Active
Contract: None
Broker: None

Insurance & bonds

BIPD / liabilityNo active filing in current snapshot

Cargo filing (census)Not recorded per census

Surety bond (census)Not recorded per census

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

No active BIPD filing in FMCSA's current snapshot.

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 56
Observed power (24 mo): 35
Trailers (towed): 29

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

Fleet age· model years · decoded VINs

12.7 yr

Average age

2026

Newest model yr

1997

Oldest model yr

49.3%

VINs decoded

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

Operations & Lanes

Revealed by inspection density across 8 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusMulti-region

revealed

States observed

US states

Inspections · 24 mo

TX busiest

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

Home base

DENVER, CO

610 SOUTH LIPAN STREET

Top corridor

TX ⇄ CO

TX 23 · CO 9 · MT 8

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

Last 12 months: 6 trucks also ran under 5 other carriers

VINs inspected under this carrier were recently inspected under other USDOTs too — the active double-broker / shared-equipment signal: USDOT 4324140 USDOT 2120653 USDOT 2568716 USDOT 3144352 USDOT 4103285Some overlap is legitimate (leased or sold equipment); review alongside the other signals.

Show all-time history (27 trucks · 18 carriers)

Across all inspections on record: USDOT 2120653 USDOT 4103285 USDOT 3518381 USDOT 3841231 USDOT 2876366 USDOT 3075126 USDOT 4324140 USDOT 3144352

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Shared w/ other carriers

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 & Federal

FMCSA census + L&I dossier

Location

Physical address: 610 SOUTH LIPAN STREET, DENVER, CO, 80223
Operation: Interstate· Hazmat

Contact

Phone: (720) 210-8794
Email: ggrossi@g4tanklines.com
Web domain: g4tanklines.com

Registration

Officer: Guillermo Grossi-Roffi
USDOT / docket: 4013855 · MC-1512057
First registered: Jan 18, 2023
Last MCS-150: Apr 16, 2026 · 1,871,200 mi (2025)
FMCSA safety rating: Not rated
Recordable crash rate: 0.00
D-U-N-S: —

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

1,871,200

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 G4 TANK LINES LLC.

G4 TANK LINES LLC (USDOT 4013855) has a Vektor safety score of 100/100 and a Clear to load verdict, from the carrier's FMCSA record refreshed Sep 6, 2026.

The carrier holds active common for-hire operating authority per FMCSA L&I as of Sep 6, 2026.

It has no active BIPD insurance filing in FMCSA L&I's current snapshot as of Sep 6, 2026.

Its vehicle out-of-service rate was 17.4% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Sep 6, 2026.

The carrier received 53 roadside inspections in the last 24 months — 46 vehicle-level and 53 driver-level — across 8 states, according to FMCSA roadside-inspection data refreshed Sep 6, 2026.

The carrier has 1 reportable crash in the last 24 months and 0 fatal crashes across the full FMCSA crash record available as of Sep 6, 2026.

It reports 56 power units and 55 drivers in its most recent MCS-150 filing dated Apr 16, 2026.

It has no FMCSA-assigned safety rating in the federal record refreshed Sep 6, 2026.

Frequently asked

What is G4 TANK LINES LLC's USDOT number?

G4 TANK LINES LLC's USDOT number is 4013855, and its motor carrier number is MC-1512057.

Is G4 TANK LINES LLC authorized to operate?

As of Sep 6, 2026, G4 TANK LINES LLC is active in the FMCSA register with common, contract, broker operating authority on file.

What is G4 TANK LINES LLC's safety record?

G4 TANK LINES LLC has a 17.4% vehicle out-of-service rate (national average 22.26%) across 67 roadside inspections, with 1 reportable crash in the last 24 months, and is not currently rated by FMCSA. Vektor's computed risk score is 100/100 (tier: clear).

How big is G4 TANK LINES LLC's fleet?

G4 TANK LINES LLC operates 56 power units and 55 drivers per its most recent MCS-150 filing.

Where is G4 TANK LINES LLC based?

G4 TANK LINES LLC is based in DENVER, CO, with roadside inspections recorded across 8 states.

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