William N Mason Inc

USDOT activeAuthority activeCarrier & Shipper · InterstateHazmat
  • USDOT227340
  • MC407667
  • LocationBaltimore, MD
  • Fleet15 power units · 11 drivers

William N Mason Inc (USDOT 227340, MC-407667) is an interstate motor carrier based in Baltimore, Maryland with 15 power units and 11 drivers reported to FMCSA. Its USDOT number and operating authority are active. FMCSA records list 21 roadside inspections in the last 24 months.

Verification snapshot · FMCSA data as of Nov 11, 2026

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Operating authority

Status from the FMCSA Company Census File, November 11, 2026

DocketAuthority typeStatus
MC-407667Contract carrierActive

First granted on July 2, 2001 · see full authority history.

Insurance

FMCSA legacy licensing records (last updated May 2026); filings may have changed since

  • Liability (BIPD) required$750,000
  • Liability (BIPD) on file$750,000
  • Cargo insurance required / on fileNo / No
  • Bond required / on fileNo / No

Filings on file

TypeInsurerCoverageEffective
Liability (BIPD) BMC-91XSentry Select Insurance Company$750,000Mar 1, 2023
Insurance history: 14 past filings
TypeInsurerEffectiveEndedReason
Liability (BIPD)Great West Casualty Co.Mar 8, 2020Mar 1, 2023Replaced
Liability (BIPD)Canal Insurance Co.Mar 8, 2019Mar 8, 2019Replaced
Liability (BIPD)Progressive Casualty Insurance CompanyMar 8, 2019May 22, 2019Cancel
Liability (BIPD)National Interstate Insurance CompanyMar 8, 2009Mar 21, 2019Term / cancl
Liability (BIPD)Carolina Casualty Insurance Co.Jul 18, 2008Mar 8, 2009Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Mar 8, 2008Jul 18, 2008Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Mar 8, 2007Mar 8, 2008Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Mar 8, 2006Mar 8, 2007Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Mar 9, 2005Mar 8, 2006Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Jul 1, 2004Mar 8, 2005Cancel
Liability (BIPD)Carolina Casualty Insurance Co.Mar 8, 2004Jul 1, 2004Cancel
Liability (BIPD)Canal Insurance Co.Mar 8, 2003Mar 8, 2004Cancel
Liability (BIPD)National Indemnity CompanyMar 8, 2002Mar 8, 2003Cancel
Liability (BIPD)Merchants and Business Men's Mutual Ins. Co.Jun 18, 2001Mar 8, 2002Cancel

Process agent (BOC-3)

Evilsizor Process Servers Inc, Littleton, CO

Inspections and crashes

Last 24 months · FMCSA Vehicle Inspection File and Crash File

21
Inspections
4 with no violations
4.8%
Driver out-of-service
1 of 21 inspections
33.3%
Vehicle out-of-service
5 of 15 inspections
1
Crashes
0 fatal · 0 injury · 1 tow-away

Inspected most often in: Maryland (13), Pennsylvania (3), Virginia (3), Connecticut (1), Texas (1).

Most recent inspection on file: October 28, 2026.

FMCSA safety rating: Satisfactory (rated November 2, 2002)

Inspection and crash counts come from FMCSA records and are shown as reported. They are not a safety rating. A crash record does not mean the carrier was at fault. FMCSA has not rated a carrier unless a safety rating is listed. For FMCSA’s own data and its explanation, see the FMCSA SAFER Company Snapshot.

Out-of-service rates are calculated by CheckTrucking from inspection records (driver: levels I, II, III, VI; vehicle: levels I, II, V, VI). They are not FMCSA scores.

Authority history

FMCSA licensing records (Motus and legacy L&I) · migration-only status adjustments are not shown

  1. Reinstated — Contract carrier authority
  2. Involuntary revocation — Contract carrier authority
  3. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 4, 2019
  4. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 6, 2009
  5. Involuntary revocation — Contract carrier authorityDiscontinued revocation on June 26, 2008
  6. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 7, 2008
  7. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 9, 2007
  8. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 8, 2006
Show 4 earlier events
  1. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 11, 2005
  2. Involuntary revocation — Contract carrier authorityDiscontinued revocation on July 1, 2004
  3. Involuntary revocation — Contract carrier authorityDiscontinued revocation on March 15, 2004
  4. Granted — Contract carrier authorityRevoked on May 28, 2019

Fleet and operations

From the company’s own registration (Form MCS-150), updated May 6, 2026

Power units
15
Trucks
15
Tractors owned
12
Trucks owned
3
Trailers owned
77
Drivers
11
CDL drivers
11
Interstate drivers
9
Intrastate drivers
2
Miles traveled
278,770 (2024)
Classification
Authorized for hire
Hazardous materials
Yes
USDOT registered
January 19, 1983
Address
Baltimore, MD

Cargo carried

  • General freight
  • Motor vehicles
  • Building materials
  • Machinery, large objects
  • Construction

Key facts

  • USDOT number 227340 was registered on January 19, 1983.
  • Operating authority MC-407667 was first granted on July 2, 2001.
  • The company last updated its FMCSA registration (Form MCS-150) on May 6, 2026.
  • It reported 278,770 vehicle miles traveled in 2024.
  • One insurance filing is on file in FMCSA’s legacy licensing records (as of May 2026), including Liability (BIPD) coverage with Sentry Select Insurance Company.
  • It had 21 roadside inspections in the last 24 months; 4 inspections recorded no violations.
  • FMCSA records list 1 reportable crash in the last 24 months.
  • Its most recent FMCSA safety rating is Satisfactory, issued on November 2, 2002.
  • Its process agent filing (BOC-3) is with Evilsizor Process Servers Inc.

Other carriers in Baltimore, MD

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