COS LLC

USDOT 2496282 · status active · 7 pass / 0 fail / 2 unknown

What this page is. A rendering of FMCSA public records on a stated date. Not a safety rating, credit score, or recommendation. Source: Company Census File (az4n-8mr2, updated 2026-10-21, sha256 73d4c5901abe8cdb…).

Checks

PASS authority_active
Registration active in the census record.

fields: status_code
UNKNOWN allowed_to_operate
Not queried. Requires the live FMCSA API; the census file does not carry this field. We never default it to pass.

fields: allowed_to_operate
UNKNOWN bipd_on_file
Absence from the gap release is not proof of coverage; the release only lists carriers with no filing. Query the live API to confirm.

fields: bipd_file
PASS mcs150_current
Last MCS-150 filing 2026-01-29.

fields: mcs150_date
PASS contact_complete
Phone and email both on file.

fields: phone, email_address
PASS shared_identifier_suppressed
No suppressed identifier on this record.

fields: phone, phy_street
PASS no_involuntary_revocation
No revocation of any kind appears in the FMCSA revocation history.

fields: dot_number
PASS out_of_service_order
No out-of-service order in the FMCSA record.

fields: dot_number
PASS authority_age
Registered 2014-04-16 (4577 days ago, ~12.5 years). Context only; new authority is a higher-risk cohort, not a verdict.

fields: add_date

Identity

Legal name	COS LLC Company Census File
DBA	CASTLE OILFIELD SERVICES Company Census File
MC number	1376430 Company Census File
Registration status	A Company Census File
Operation type	A Company Census File
Registered since	2014-04-16 Company Census File

Contact

Phone	7015721832 Company Census File
Email	castleoil.bookkeeping@gmail.com Company Census File
Officer 1	PENNY BROWN Company Census File
Officer 2	— Company Census File

Address

Street	501 48TH AVE W Company Census File
City	WILLISTON Company Census File
State	ND Company Census File
ZIP	58801 Company Census File
Country	US Company Census File

Fleet (self-reported on MCS-150)

Truck units	20 Company Census File
Power units	20 Company Census File
Drivers	19 Company Census File
CDL drivers	14 Company Census File
Intrastate drivers	0 Company Census File
Last MCS-150 filing	2026-01-29 Company Census File

Related carriers

No other active carrier shares this carrier's officer and address in the public record.

Safety history

Counts from FMCSA inspection and crash records, all history on file. Not a safety rating; FMCSA assigns ratings only after an on-site review.

Inspections	18 driver 23 · vehicle 92
Out-of-service	31 (172.2% of inspections) driver 7 · vehicle 24
Violations	114
Inspection span	2024-01-06 – 2026-04-18
Crashes	5 fatal 0 · injury 2 · tow-away 5
Crash span	2023-07-19 – 2026-05-17

Rulebook v1 · JSON