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

Authority & Insurance

Active operating authority by type and the full insurance continuity timeline — insurer, policy, coverage, and any lapses — so you can confirm they can legally and adequately haul your load today.

Operating authority· 49 CFR · per type

Operating authority

Common
None
Contract
Active
Broker
None

Insurance & bonds

BIPD / liability$750,000 in force
Cargo filing (census)Not recorded per census
Surety bond (census)Not recorded per census

Insurance adequacy· filed BIPD vs the $750K federal floor

$750K in forcegeneral-freight federal minimum
$750K floor

Filed BIPD coverage of $750K meets or exceeds the $750K federal minimum for general freight (49 CFR 387.9). Some commodities (hazmat, larger vehicles) require $1M–$5M — confirm against your load.

Insurance continuity· insurer · policy · lapses

$750K BIPD last filed ’23 · 7 insurers · 1 lapseCoverage lapse
2001200820152022now

Shorter eras are too brief to label at this scale — all 8 insurers are named in the list below.

BIPD in force — $750,000 · SENTRY SELECT INSURANCE COMPANY · since Mar 2023

All 8 insurer eras · dates, limits, renewals
InsurerPeriodLimitRenewals
GREAT WEST CASUALTY CO.Mar 2020 → Mar 2023$750K1
PROGRESSIVE CASUALTY INSURANCE COMPANYMar 2019 → May 2019$750K1
CANAL INSURANCE CO.Mar 2019 → Mar 2019$750K2
NATIONAL INTERSTATE INSURANCE COMPANYMar 2009 → Mar 2019$750K2
CAROLINA CASUALTY INSURANCE CO.Mar 2004 → Mar 2009$750K7
CANAL INSURANCE CO.Mar 2003 → Mar 2004$750K1
NATIONAL INDEMNITY COMPANYMar 2002 → Mar 2003$750K1
MERCHANTS AND BUSINESS MEN'S MUTUAL INS. CO.Jun 2001 → Mar 2002$750K1