Is three.co.uk Safe? Security Analysis for Hutchison 3G UK Ltd (Three)
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
Three UK, operated by Hutchison 3G UK Ltd, is a major telecommunications provider in the United Kingdom offering mobile phones, tablets, mobile broadband, and SIM only deals primarily on the UK's fastest 5G network. The… Unlock the full Guard report to read the complete analysis.
Detected Technologies
Keep three.co.uk under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
Cancel anytime. Alerts sent to the contacts you choose. Unlock the full report to view historical timelines and alerts.
Security Headers
3 findings
80/100
GDPR Compliance
3 findings
68/100
NIS2 Compliance
9 findings
2/100
Email Security
2 findings
92/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Snapshot shown below. Unlock the full AI report for complete market insights, audience profiling, and step-by-step recommendations.
Business Intelligence
Market & Strategic Analysis
Three UK holds a significant market position as a leading mobile network operator in the UK, leveraging 5G technology to attract consumers and businesses. Their business model focuses on providing a range of mobile and broadband services with competitive pricing and device offerings. The company benefits from being part of CK Hutchison Holdings, a global conglomerate, which supports its scale and resources. The website's content and marketing tools reflect a focus on customer acquisition and retention through digital channels. The absence of detailed contact information and compliance policies in the analyzed content suggests these may be located elsewhere or require better visibility. The partnership ecosystem includes major advertising and analytics providers such as Google and Adobe.
Security Posture Analysis
Comprehensive Security Assessment
The website employs HTTPS with a presumably strong SSL configuration, enhancing data confidentiality and integrity. However, the absence of visible security headers like Content-Security-Policy or X-Frame-Options reduces defense in depth. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. The lack of a security.txt or vulnerability disclosure page limits transparency for security researchers. Forms and input fields were not detected in the provided snippet, so input validation and CSRF protections could not be assessed. Overall, the security posture is good but could be improved by implementing additional HTTP security headers and formal vulnerability disclosure processes.
Strategic Recommendations
Priority Actions for Security Improvement
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✨Observations
AI-powered comprehensive website and business analysis.
A preview of your strategic observations is visible. Upgrade to unlock the full competitive positioning, trust signals, and branding checklist.
AI-Enhanced Website Analysis
Business Insights
Hutchison 3G UK Ltd (Three)
Get phones, tablets, Mobile Broadband and SIM Only deals on the UK’s Fastest 5G Network.
good
consistent
Technical Stack
moderate
good
basic
good
Security Assessment
- HTTPS enforced
- Google site verification present
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with no WAF blocking
🛡️Security Headers
HTTP security headers analysis and recommendations.
Some header findings are shown. Unlock to see the full checklist, impacted endpoints, and remediation guidance.
Security Headers
HTTP security headers analysis
Missing Referrer-Policy header
LOWControls referrer information sent with requests Unlock the full report to read the complete fix.
Missing Permissions-Policy header
MEDIUMControls browser features and APIs Unlock the full report to read the complete fix.
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages Unlock the full report to read the complete fix.
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
Preview of GDPR checkpoints is visible. Unlock to reveal full evidence, policy excerpts, and DPIA guidance.
GDPR Compliance
Privacy and data protection assessment
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies Unlock the full report to read the complete fix.
No Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR Unlock the full report to read the complete fix.
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements Unlock the full report to read the complete fix.
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
You can see headline NIS2 checks. Upgrade to access the full control mapping, severity breakdown, and remediation plan.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures Unlock the full report to read the complete fix.
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure Unlock the full report to read the complete fix.
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management Unlock the full report to read the complete fix.
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans Unlock the full report to read the complete fix.
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity Unlock the full report to read the complete fix.
No security contact information
HIGHNIS2 requires clear incident reporting channels Unlock the full report to read the complete fix.
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure Unlock the full report to read the complete fix.
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts Unlock the full report to read the complete fix.
Critical sector without clear security compliance
HIGHDetected sectors: energy, transport, banking, health, digital Unlock the full report to read the complete fix.
📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Quick view of email authentication checks is provided. Unlock to uncover full DNS evidence, record diffs, and fix scripts.
Email Security
SPF, DKIM, and DMARC validation
Complex SPF record
LOWToo many include statements can cause lookup limits Unlock the full report to read the complete fix.
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues Unlock the full report to read the complete fix.
SPF Details
DKIM Selectors Found
DMARC Details
MTA-STS Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
This is a teaser of the TLS audit. Unlock to view certificate chains, cipher support tables, and remediation steps.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1 Unlock the full report to read the complete fix.
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs Unlock the full report to read the complete fix.
Protocol Support
OCSP Status
📊DNS Health
DNS configuration and security assessment.
Unlock the full DNS posture audit to reveal misconfigurations, zone records, and actionable fixes.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain Unlock the full report to read the complete fix.
Domain Transfer Lock Not Enabled
MEDIUMDomain can be transferred without authorization Unlock the full report to read the complete fix.
Domain Delete Lock Not Enabled
LOWDomain can be deleted without additional verification Unlock the full report to read the complete fix.
Domain Registration Details
- •No domain protection locks enabled
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
See a glimpse of exposed services. Unlock to access full port inventories, CVE lookups, and mitigation priorities.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports Unlock the full report to read the complete fix.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Unlock to view the complete technical breakdown, stack fingerprinting, and hardening checklist.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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