Carrier profile · USDOT 227340 · MC-407667 · Updated Jun 13, 2026

WILLIAM N MASON INC

15 power unitsavg 16.9 yrRegional · 6 statesBALTIMORE, MD87/100
CARRIER ACTIVEMC-407667 ACTIVERATED SATISFACTORYHAZMAT
Verified linksmasoninc.comFMCSA SAFER

Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional
revealed
States observed6
US states
Inspections · 24 mo21
MD busiest

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

Home base
BALTIMORE, MD
3510 WILKENS AVE
Top corridor
MD
MD 13 · VA 4 · TX 1
Density
fewermore
Shade = roadside inspections, last 24 mo.

State activity ranking· all 6 states · trailing 24 mo

Roadside inspections by state · WILLIAM N MASON INC · trailing 24 months
StateCoverageInspections
MDMarylandHQ13
VAVirginia4
TXTexas1
CTConnecticut1
PAPennsylvania1
DEDelaware1