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Security report for crowncastle.com

Crown Castle · Telecommunications · United States

Medium risk. 6 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

64/100

Risk levelMedium

0–100, higher is better. How it is calculated

Crown Castle is a leading telecommunications infrastructure provider in the United States, specializing in shared communications infrastructure such as cell towers, small cells, and fiber networks. The company positions itself as the nation's largest provider in this sector, targeting wireless carriers, public sector entities, industrial enterprises, property owners, and investors. Their business model focuses on leasing and managing infrastructure assets to enable wireless connectivity nationwide. The website reflects a mature enterprise with comprehensive service offerings and a strong market presence. Technically, the website employs a modern technology stack including Vue.js, jQuery, and integrates multiple marketing and analytics platforms such as Google Analytics, Microsoft Clarity, Hotjar, and Marketo. The site is mobile-optimized, accessible, and SEO-friendly, with fast to moderate performance. The use of reputable third-party services and secure form handling indicates a mature digital infrastructure. From a security perspective, the site enforces HTTPS and uses secure form submissions. However, explicit security headers like Content-Security-Policy and X-Frame-Options are not evident in the HTML source, suggesting room for improvement. No vulnerabilities or exposed sensitive data were detected. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. The WHOIS data is unavailable, likely due to privacy protection, but the website's professionalism and consistency support its legitimacy. Overall, Crown Castle's website demonstrates a strong business and technical foundation with good security practices. Recommendations include enhancing security headers, publishing an incident response policy, and adding a vulnerability disclosure program to further strengthen trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

6 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

Need hands-on remediation? Email guard@offseq.com

Keep watching crowncastle.com

This scan found 24 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
47
Security headers
15
Email security
85
DNS health
80
Network security
100
GDPR outside view
58
Average
64

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Crown Castle operates in the telecommunications infrastructure sector, serving wireless carriers, government agencies, industrial enterprises, and property owners. Their competitive advantage lies in being the largest shared infrastructure provider in the U.S., offering extensive cell towers, small cells, and fiber assets. The business model is asset-heavy, focusing on leasing infrastructure to multiple clients, generating recurring revenue streams. The website's investor relations presence and professional content indicate a publicly traded or large enterprise with significant market influence. The company leverages partnerships and advanced marketing tools to engage target segments and drive growth. The presence of a careers section and community links suggests a focus on corporate social responsibility and talent acquisition.

Security posture

The website exhibits a good security posture with enforced HTTPS and secure form handling via Marketo. Multiple tracking and analytics scripts are used, but no sensitive data leakage or vulnerable libraries were detected. The absence of explicit security headers like CSP and X-Frame-Options is a minor gap. No incident response or security policy pages were found, indicating an opportunity to improve transparency and readiness. Privacy and cookie policies are comprehensive and GDPR compliant, reflecting attention to regulatory requirements. Overall, the security maturity is solid for a corporate website but can be enhanced by implementing additional headers and publishing security policies.

Recommendations

  1. Implement and enforce security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish a dedicated incident response and security policy page to improve transparency and preparedness.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Regularly audit and update third-party scripts to minimize risk from external dependencies.
  5. Enhance data retention and privacy disclosures to align with evolving compliance standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Crown Castle
Description
Crown Castle is the nation's largest provider of shared communications infrastructure—cell towers, small cells, fiber—connecting people and businesses to data & technology.
Key services
Cell towers, Small cells, Fiber infrastructure, Leasing space on towers and rooftops, Network site availability
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.6.3, Vue.js 2, Marketo Forms, Google Tag Manager, Google Analytics, Microsoft Clarity, LinkedIn Insight Tag, Facebook Pixel, Twitter Universal Website Tag, Hotjar, Bing Ads, Vimeo Player API, Dynamic Yield, Crownpeak Search
Frameworks
Vue.js
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Secure form submissions via Marketo
  • No exposed sensitive data in HTML
  • Use of reputable third-party analytics and marketing scripts

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, Hotjar, Marketo Munchkin
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Bing Ads, Twitter Ads, Facebook Ads
Tracking pixels
Facebook Pixel, LinkedIn Insight Tag, Twitter Universal Website Tag, Microsoft Clarity, Hotjar, ZoomInfo Pixel, Marketo Munchkin
Marketing tools
Marketo, Dynamic Yield, Crownpeak Search
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and interactive features.
  2. Strong branding and consistent messaging throughout the site.
  3. Multiple marketing and analytics tools integrated for user tracking and engagement.
  4. No signs of malicious or suspicious content.
  5. WHOIS data is unavailable, which is common for large enterprises using privacy or proxy services.
Technical notes

Notes

The website uses a modern and diverse technology stack including Vue.js for frontend interactivity, jQuery for legacy support, and integrates multiple marketing and analytics platforms such as Google Tag Manager, Microsoft Clarity, Hotjar, and Marketo. The site is mobile-optimized with responsive design and accessibility features. Performance is moderate, with some reliance on external CDNs and third-party scripts which may impact load times. The use of Vimeo for video content and Dynamic Yield for personalization indicates advanced user engagement strategies. No CMS was explicitly detected, suggesting a custom or proprietary platform. Overall, the technical infrastructure supports a robust and scalable digital presence suitable for an enterprise-level telecommunications company.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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