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Carrier profile · USDOT 8421 · Updated 06/13/2026

INSULATION & REFRACTORIES SERVICES INC

5 power unitsMEMPHIS, TN

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)

Awaiting decode

Call dispatch(901) 522-4300

Click to see how we scored it

Load decision · FMCSA snapshot · 2026-06-13

Limited record

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

Established 52 yearsNo inspection history despite active fleet

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

—

Awaiting VIN decode

Identity stabilityStable

52 yr unchanged

Same registration since 1974 — no chameleon / reincarnation signal.

AI readCarrier, 52-yr registration — unrated.Full read

Is INSULATION & REFRACTORIES SERVICES INC safe to load? INSULATION & REFRACTORIES SERVICES INC (USDOT 8421) is an active small-fleet motor carrier based in MEMPHIS, TN, operating 5 power units and 9 drivers. Operating authority has been active 52 years (past the 24-month broker-confidence threshold). FMCSA rates it Satisfactory. Vektor does not assign this carrier a safety score — there is not enough federal record to assess it. Verify authority and insurance directly. Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.

FMCSA fields + Vektor analysis · updated 2026-06-13

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: 06/01/197452 years ago
Domicile: MEMPHIS, TN
Self-reported fleet: 5 power units9 drivers
Last MCS-150: 03/20/2026
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 →