Carrier profile · USDOT 8421 · Updated Aug 20, 2026

Insulation & Refractories Services Inc

5 power unitsMEMPHIS, TN50/100

AUTHORITY STATUS UNKNOWNRATED SATISFACTORY

Observed fleet · trailing 24 mo daily

5Power units

Self-reported · MCS-150

—Trailers seen

None observed · 24 mo

—Avg age (yr)

Not yet decoded

Call dispatch(901) 522-4300

Click to see how we scored it

Load decision · FMCSA snapshot · Aug 20, 2026

Limited record

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

Watch · 1

No inspection history despite active fleetAn established carrier reporting 5 power units has no roadside inspections — a common shell/paper-carrier signal.

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-mo—

No inspections · 24 mo

Crashes · fatal—

No crash record

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo—

No inspections · 24 mo

Crashes · fatal—

No crash record

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

Fleet typeIdentity

Small fleet

5 power units. Brokers price each fleet type apart.

Fleet age vs peersDecoding

—

Not yet decoded

Identity stabilityStable

52 yr unchanged

Same registration since 1974 — no chameleon / reincarnation signal.

What we know

This carrier has a federal identity but no operating activity on the record. Everything the FMCSA holds is below — we're not drawing empty charts around it.

On the federal record· FMCSA census + L&I

USDOT: 8421
USDOT registration: Active
Registered: Jun 1, 197452 years ago
Domicile: MEMPHIS, TN
Self-reported fleet: 5 power units9 drivers
Last MCS-150: Mar 20, 2026
Phone: (901) 522-4300

Why this record is thin· what the federal datasets return

No roadside inspections on the FMCSA record — so there is no out-of-service rate, no BASIC percentile and no violation history to show.
No equipment observed in inspections — so no VIN-decoded units, fleet age or trailer count.
No inspection geography — so no operating footprint or lane map.
No insurance filing history on record — so no coverage limit, insurer or continuity timeline to chart.

An absent record is not a clean record. Verify operating authority and insurance directly with FMCSA — and request a certificate of insurance — before tendering a load.

Federal record →Authority & insurance →

Verification summaryAuthority, insurance, safety and identity facts for INSULATION & REFRACTORIES SERVICES INC.

INSULATION & REFRACTORIES SERVICES INC (USDOT 8421) is unrated by Vektor because the carrier's FMCSA record does not contain enough evidence for a safety score as of Aug 20, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Aug 20, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Aug 20, 2026.

The carrier received 0 roadside inspections in the last 24 months — 0 vehicle-level and 0 driver-level, according to FMCSA roadside-inspection data refreshed Aug 20, 2026.

It reports 5 power units and 9 drivers in its most recent MCS-150 filing dated Mar 20, 2026.

It has an FMCSA safety rating of Satisfactory assigned Dec 3, 1993 in the federal record refreshed Aug 20, 2026.

Frequently asked

What is INSULATION & REFRACTORIES SERVICES INC's USDOT number?

INSULATION & REFRACTORIES SERVICES INC's USDOT number is 8421.

Is INSULATION & REFRACTORIES SERVICES INC authorized to operate?

As of Aug 20, 2026, INSULATION & REFRACTORIES SERVICES INC is active in the FMCSA register.

How big is INSULATION & REFRACTORIES SERVICES INC's fleet?

INSULATION & REFRACTORIES SERVICES INC operates 5 power units and 9 drivers per its most recent MCS-150 filing.

Where is INSULATION & REFRACTORIES SERVICES INC based?

INSULATION & REFRACTORIES SERVICES INC is based in MEMPHIS, TN.

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