Carrier profile · USDOT 191671 · Updated Sep 6, 2026

Griner Drilling Service Inc

87 power unitsavg 14 yrRegional · 3 statesCOLUMBIA, MS86/100

AUTHORITY STATUS UNKNOWNRATED SATISFACTORYHAZMAT

Observed fleet · trailing 24 mo daily

87Power units

8 observed · MCS-150

5Trailers seen

Decoded · vPIC

14.0Avg age (yr)

2001–2019 · vPIC

Call dispatch(601) 736-6347 Email dispatchgrayborn@grinerdrillingservice.com

Click to see how we scored it

Load decision · FMCSA snapshot · Sep 6, 2026

Clear to load

Clear under the current scoring — review the flagged signal below before loading.

Watch · 1

Vehicle out-of-service rate well above average50.0% of vehicle inspections were placed out of service vs the 22.26% national average.

In good standing · 1

Established 52 yearsOperating authority has been on file since 1974.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo50.0%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo50.0%

▲ 22.26% nat'l

Crashes · fatal

Clean · 24 mo

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

Fleet typeIdentity

Asset-based

87 power units. Brokers price each fleet type apart.

Fleet age vs peersOlder

14 yr

Model years 2001–2019 · peer benchmark unavailable.

Identity stabilityStable

52 yr unchanged

Same registration since 1974 — no chameleon / reincarnation signal.

Safety

8 inspections · 24 mo · vs national benchmarks

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

Vehicle OOS 50.0%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 — 6 vehicle and 8 driver inspections over 24 months.

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

50.0% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 17.2 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

7 inspections in the charted months · busiest month Jun '25 · 2

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

≈0.0 / unit·yr

thin signalabundant signal

Few roadside inspections for a 87-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: 87
Inspections · 24 mo: 8
Annualized: ≈4 / yr
Coverage: ≈0.0 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.

396.17 Periodic (annual) inspectionVehicle Maintenance2 · 0 OOS
393.75 Tires (defective / underinflated / worn)Vehicle Maintenance2 · 2 OOS
393.78 Windshield wipersVehicle Maintenance2 · 0 OOS
393.11 Required lamps/reflectors missingVehicle Maintenance1 · 1 OOS
393.43 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 1 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance1 · 0 OOS
383.23 Operating without a valid CDLDriver Fitness1 · 1 OOS
393.9 Inoperative required lampsVehicle Maintenance1 · 1 OOS
391.15 Driver qualificationsDriver Fitness1 · 1 OOS
392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving1 · 0 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & Insurance

Can they legally + adequately haul your load?

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

This timeline is the FMCSA filing history, and it ends at the most recent superseded filing — current policy status is not tracked here. Request a certificate of insurance to confirm active coverage before tendering.

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 87
Observed power (24 mo): 8
Trailers (towed): 5

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

Fleet age· model years · decoded VINs

14.0 yr

Average age

2019

Newest model yr

2001

Oldest model yr

7.7%

VINs decoded

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

LA busiest

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

Home base

COLUMBIA, MS

1014 HIGHWAY 98 BYPASS

Top corridor

LA ⇄ MS

LA 4 · MS 3 · FL 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 & Federal

FMCSA census + L&I dossier

Location

Physical address: 1014 HIGHWAY 98 BYPASS, COLUMBIA, MS, 39429-8255
Mailing address: DRAWER 825, COLUMBIA, MS, 39429-0825
Operation: Interstate· Hazmat

Contact

Phone: (601) 736-6347
Fax: (601) 731-1853
Email: grayborn@grinerdrillingservice.com
Web domain: grinerdrillingservice.com

Registration

Officers: Charles H. Griner, Sr. · Charles H Griner, Jr.
USDOT / docket: 191671
First registered: Jun 1, 1974
Last MCS-150: Jan 10, 2025 · 1,500,000 mi (2024)
FMCSA safety rating: Satisfactory · May 20, 2005
D-U-N-S: 33277161

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

1,500,000

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 GRINER DRILLING SERVICE INC.

GRINER DRILLING SERVICE INC (USDOT 191671) has a Vektor safety score of 86/100 and a Clear to load verdict, from the carrier's FMCSA record refreshed Sep 6, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Sep 6, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Sep 6, 2026.

Its vehicle out-of-service rate was 50.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Sep 6, 2026.

The carrier received 8 roadside inspections in the last 24 months — 6 vehicle-level and 8 driver-level — across 3 states, according to FMCSA roadside-inspection data refreshed Sep 6, 2026.

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

It reports 87 power units and 42 drivers in its most recent MCS-150 filing dated Jan 10, 2025.

It has an FMCSA safety rating of Satisfactory assigned May 20, 2005 in the federal record refreshed Sep 6, 2026.

Frequently asked

What is GRINER DRILLING SERVICE INC's USDOT number?

GRINER DRILLING SERVICE INC's USDOT number is 191671.

Is GRINER DRILLING SERVICE INC authorized to operate?

As of Sep 6, 2026, GRINER DRILLING SERVICE INC is active in the FMCSA register.

What is GRINER DRILLING SERVICE INC's safety record?

GRINER DRILLING SERVICE INC has a 50.0% vehicle out-of-service rate (national average 22.26%) across 15 roadside inspections, with 0 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 86/100 (tier: clear).

How big is GRINER DRILLING SERVICE INC's fleet?

GRINER DRILLING SERVICE INC operates 87 power units and 42 drivers per its most recent MCS-150 filing.

Where is GRINER DRILLING SERVICE INC based?

GRINER DRILLING SERVICE INC is based in COLUMBIA, MS, with roadside inspections recorded across 3 states.

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