--- title: "COS LLC | DOT 2496282 | Carrier Profile" url: https://runalphaloops.com/carrier/nd/2496282/cos-llc description: "COS LLC is a interstate carrier based in WILLISTON, ND. Fleet size: 20 power units, 19 drivers. DOT# 2496282, MC# 1376430." lang: en --- Active Interstate # COS LLC DBA: CASTLE OILFIELD SERVICES Risk score · full evidence · 72-hour access · No account required DOT # 2496282 MC # 1376430 Location WILLISTON, ND Phone 7015721832 Power Units 20 Drivers 19 Trailers 2 Annual Miles In full report Entity Type N/A MCS-150 Date Jan 29, 2026 ## Risk Signals — COS LLC Scanning active Data available for 3 of 4 areas The full report covers each area below with the underlying FMCSA records, linked carriers, and news sources. Historical patterns Included in the full report DATA AVAILABLE Safety record Included in the full report DATA AVAILABLE Chameleon connections Included in the full report DATA AVAILABLE Recent news No records on file NO DATA Unlock the full vetting report Get the risk score, full analysis, and the specific evidence + sources behind every area. One-time · no account required ## Crash Summary Crashes (24 Months) 3 FMCSA-reportable Fatal Crashes 0 0 fatalities Injury Crashes 2 2 people injured Tow-Away Crashes 1 No injury or fatality All records since Jul 2023 5 crashes · 0 fatal Most recent crash May 17, 2026 Based on FMCSA crash data. Includes all reportable crashes regardless of fault; each crash is counted once by its most severe outcome. ## Counterparty Reports Email-verified, moderated transaction reports from brokers, shippers, and carriers who worked with COS LLC. No verified counterparty reports yet Worked a load with COS LLC? Be the first to report how it went. ## About COS LLC COS LLC (doing business as CASTLE OILFIELD SERVICES) is a interstate carrier headquartered in WILLISTON, ND 58801. Registered with the U.S. Department of Transportation under DOT number 2496282 and MC number 1376430, the company currently operates a fleet of 20 power units with 19 drivers. ### Related Companies 1 found Who this carrier is linked to and how — shared officers, common addresses, and entities under the same ownership. ### Service Regions Active in 5 states Top states: ND WY SD TX MT Full state-by-state operating volumes, inspection locations, and lane coverage analysis. ### CSA Safety Scores 1 alert 5 BASICs measured Percentile rankings pending FMCSA publication — raw measures + violations available in the report. Full BASIC percentiles, measure scores, BASIC + roadside alerts, and Acute Carrier flags from the latest FMCSA SMS snapshot. ## Operating Authority Common Authority Holds Active Authority(4.6 years) Contract Authority No Authority Broker Authority No Authority ### Insurance & Coverage BIPD, cargo, and excess liability coverage amounts, policy history, and insurer names. ## Contact Information 7015721832 Physical Address 501 48TH AVE W WILLISTON, ND 58801 ## Cargo & Operations Cargo Carried Liquid Gas Oil ### Violations by Category 82 total Most common category Vehicle Maintenance · 43% of violations across 8 categories Full violation breakdown by category, out-of-service rates, and historical trends over time. ### Fleet Analytics 16 trucks Top manufacturers KENWORTH FREIGHTLINER RAM Sample units GXHTXXXXX 2026 FREIGHTLINER SPRINTER 3500 3GTUUBE8XPG2XXXXX 2023 RAM 5500 HD Full manufacturer, model, and model-year breakdown plus the VIN-level fleet roster. Are you COS LLC? Claim this profile to respond to reviews, keep your info current, and dispute inaccurate signals. Free forever. Vet at Scale ## Need more than a one-off vetting report? Unlimited vetting across every U.S. carrier, monitored continuously — with insurance, risk, contacts, and crash data built into your workflow. See AlphaLoops for Brokers: https://runalphaloops.com/lp/broker-vetting Free trial · no credit card upfront Covers every U.S. carrier Risk score · evidence · 72h access ## About this data Information on this page is compiled from public records and third-party sources, including FMCSA registration, inspection, and crash data and publicly available court and news records, and may include automated analysis. It is provided for general informational purposes only, may be incomplete, out of date, or contain errors, and is provided "as is" without warranties of any kind. Risk indicators and summaries reflect our assessment of the available data; they are not an FMCSA safety rating or a determination of any carrier's safety, fitness, or creditworthiness. Verify information with the carrier and original sources, such as FMCSA SAFER, before relying on it. AlphaLoops is not a consumer reporting agency, and this information may not be used as a factor in determining eligibility for credit, insurance, employment, or any other purpose covered by the Fair Credit Reporting Act. If you represent this carrier and believe information on this page is inaccurate, email hello@runalphaloops.com with your USDOT number and the item in question. See our Terms (https://runalphaloops.com/terms). ## Structured data ```json [ { "@context": "https://schema.org", "@type": "LocalBusiness", "name": "COS LLC", "alternateName": "CASTLE OILFIELD SERVICES", "url": "https://runalphaloops.com/carrier/nd/2496282/cos-llc", "areaServed": [ { "@type": "State", "name": "ND" }, { "@type": "State", "name": "WY" }, { "@type": "State", "name": "SD" }, { "@type": "State", "name": "TX" }, { "@type": "State", "name": "MT" } ], "address": { "@type": "PostalAddress", "streetAddress": "501 48TH AVE W", "addressLocality": "WILLISTON", "addressRegion": "ND", "postalCode": "58801", "addressCountry": "US" }, "telephone": "7015721832", "identifier": [ { "@type": "PropertyValue", "name": "DOT Number", "value": "2496282" }, { "@type": "PropertyValue", "name": "MC Number", "value": "1376430" } ], "numberOfEmployees": { "@type": "QuantitativeValue", "value": 19 } }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is COS LLC's DOT number?", "acceptedAnswer": { "@type": "Answer", "text": "COS LLC's USDOT number is 2496282. Their motor carrier number (MC#) is 1376430. These numbers are assigned by the Federal Motor Carrier Safety Administration (FMCSA)." } }, { "@type": "Question", "name": "Where is COS LLC located?", "acceptedAnswer": { "@type": "Answer", "text": "COS LLC is based in WILLISTON, ND 58801. They can be reached at 7015721832." } }, { "@type": "Question", "name": "How large is COS LLC's fleet?", "acceptedAnswer": { "@type": "Answer", "text": "COS LLC operates 20 power units with 19 drivers." } }, { "@type": "Question", "name": "Is COS LLC currently active?", "acceptedAnswer": { "@type": "Answer", "text": "COS LLC's USDOT registration is currently listed as active." } } ] }, { "@context": "https://schema.org", "@type": "WebSite", "name": "AlphaLoops", "alternateName": [ "AlphaLoops.com", "Run AlphaLoop" ], "url": "https://runalphaloops.com/" } ] ```