# Arch Coal Security Rating, Vendor Risk Report, and Data Breaches > This is a plain-markdown summary of [https://www.upguard.com/security-report/archcoal](https://www.upguard.com/security-report/archcoal), generated for AI agents and LLMs. Security scores and check results reflect UpGuard's independent analysis and are kept in sync with the source page. Visit the source URL for the full interactive report. Arch Coal is a coal producer that operates mining complexes in the United States. The company extracts and processes thermal and metallurgical coal for domestic and international markets, serving electric utilities and steel manufacturers. ## Overview - Domain: archcoal.com - Grade: C (Fair) - Score: 584 / 950 - Last scan: August 22, 2026 - Industry: Mining, Oil and Gas - Website: https://www.archcoal.com - Employees: 4k+ - Location: Creve Coeur, MO, United States ## Vendor risk summary This vendor risk report is based on UpGuard's continuous monitoring of Arch Coal's security posture using open-source, commercial, and proprietary threat intelligence feeds. The results are summarized into a security rating based on the analysis of hundreds of individual checks across five risk categories: website security, email security, phishing & malware, brand & reputation risk, and network security. ## Security categories ### Website Security - Fail — CSP is not implemented - No valid Content Security Policy is implemented. This increases the risk of XSS and clickjacking attacks. - Fail — X-Content-Type-Options is not nosniff - Browsers may interpret files as a different MIME type than what is specified in the Content-Type HTTP header. This can lead to MIME confusion attacks. - Pass — Server information header not exposed - Ensuring the server information header is not exposed reduces the ability of attackers to exploit certain vulnerabilities. - Pass — X-Powered-By header not exposed - Information about specific technology used on the server is obscured. - Pass — X-Frame-Options is not deny or sameorigin - Browsers are prevented from displaying this website's content in frames. This helps mitigate clickjacking attacks. - Pass — Referrer policy is not unsafe-url - The website's Referrer Policy is not configured to allow unsafe information to be sent in the referrer header. - Pass — ASP.NET version header not exposing specific ASP.net version - Ensuring the ASP.NET version header is not exposing a specific version makes it harder for attackers to exploit certain vulnerabilities. - Pass — ASP.NET version header not exposed - Ensuring the ASP.NET version header is not exposed makes it harder for attackers to exploit certain vulnerabilities. - Pass — No unmaintained page detected - The page appears to be maintained. ### Email - Fail — DMARC policy is p=quarantine - The DMARC policy should be set to p=reject for maximum protection. - Pass — DMARC policy exists - DMARC protects against fraudulent emails being sent from a domain. - Pass — Strict SPF filtering - not using +all - Sender Policy Framework (SPF) record strictly enforces specific domains allowed to send email on its behalf. - Pass — SPF syntax correct - Sender Policy Framework (SPF) record passes basic syntax checks. - Pass — DMARC policy percentage is default - DMARC policy percentage is set to default 100%, ensuring all mail is covered by the policy. - Pass — SPF ptr mechanism not used - Sender Policy Framework (SPF) record does not include the ptr mechanism. ### Network - Fail — 'HTTP' port open - The 'HTTP' service is running and exposed to the internet. The configuration of the server should be reviewed and unnecessary ports closed. - Fail — 'HTTPS' port open - The 'HTTPS' service is running and exposed to the internet. The configuration of the server should be reviewed and unnecessary ports closed. ### DNS - Fail — DNSSEC not enabled - DNSSEC records prevent third parties from forging the records that guarantee a domain's identity. DNSSEC should be configured for this domain. - Pass — No unregistered MX records detected - No unregistered MX records that could lead to receiving mail on behalf of the target organization were detected. - Pass — Domain has not expired - Domain has not expired. - Pass — No subdomain takeover vulnerability detected - No dangling DNS records that could lead to subdomain takeover were detected. - Pass — Domain does not expire soon - Domain does not expire within 30 days. - Pass — Domain not flagged as inactive - Domain is not flagged as inactive. - Pass — Domain not pending deletion - Domain is not pending deletion with the registrar. - Pass — Domain not pending restoration - Domain is not pending restoration with the registrar. - Pass — Domain registrar or registry deletion protection enabled - Domain is protected from unsolicited deletion requests with the registrar or registry. - Pass — Domain registrar or registry transfer protection enabled - Domain is protected from unsolicited transfer requests. - Pass — Domain registrar or registry update protection enabled - Domain is protected from unsolicited update requests with the registrar or registry. - Pass — Domain free of registrar DNS resolution hold - Domain is not under a DNS resolution hold with the registrar. - Pass — Domain free of registry DNS resolution hold - Domain is not under a DNS resolution hold with the registry itself. - Pass — Domain renewal not prohibited by registry - Domain is not prohibited from renewal at the registry itself. ### Encryption - Fail — SSL not available - SSL is the standard encryption method for browsing websites. Enabling SSL requires installing an SSL certificate on the site. - Fail — HTTP does not redirect to HTTPS - The domain is still accessible over HTTP. All HTTP requests should be redirected to HTTPS. ### Data leakage - Pass — No open cloud storage service detected - No cloud storage service configured to allow anonymous file listing was detected. - Pass — Domain index is not a listable directory - The domain index is not a listable directory. ### IP/Domain Reputation - Pass — No reports of botnet activity in the last 30 days - This IP/domain has not been reported as a source of botnet activity in the last 30 days. - Pass — No reports of brute force login attempts in the last 30 days - This IP/domain did not appear on any list of IPs and domains known to perform brute force login attempts in the last 30 days. - Pass — No reports of malware distribution in the last 30 days - This IP/domain has been reported for distributing malware in the last 30 days. - Pass — No reports of unsolicited scanning in the last 30 days - This IP/domain has not been reported for performing unsolicited scanning in the last 30 days. - Pass — No reports of phishing activity in the last 30 days - This IP/domain has not been reported as a phishing site in the last 30 days. - Pass — No reports of botnet activity in the last 90 days - This IP/domain has not been reported as a source of botnet activity in the last 90 days. - Pass — No reports of brute force login attempts in the last 90 days - This IP/domain did not appear on any list of IPs and domains known to perform brute force login attempts in the last 90 days. - Pass — No reports of malware distribution in the last 90 days - This IP/domain has been reported for distributing malware in the last 90 days. - Pass — No reports of unsolicited scanning in the last 90 days - This IP/domain has not been reported for performing unsolicited scanning in the last 90 days. - Pass — No reports of phishing activity in the last 90 days - This IP/domain has not been reported as a phishing site in the last 90 days. --- Full interactive report: https://www.upguard.com/security-report/archcoal Security Reports Policy: https://www.upguard.com/security-report-policy