Is three.co.uk legit?

93
/ 100
Trusted
Industry: Telecom

three.co.uk appears to be a highly trustworthy website, backed by solid infrastructure, strong security, and a very long operational history. While a minor transparency detail regarding WHOIS data was noted, it does not detract significantly from the overall reliability of the site.

Telecom average: 74/100 · based on 25 sites

Checked: April 18, 2026 at 8:27 AM UTC · Refresh

Is three.co.uk a scam? Here's what we found.

Security 95/100

The site boasts an excellent security configuration, utilizing the latest TLS 1.3 encryption, robust content security policies, and robust clickjacking protection. It's also clean according to Google Web Risk, indicating a safe browsing environment.

Identity 90/100

With a domain registered for nearly 30 years and ample contact information, the identity behind three.co.uk is very clear. A minor WHOIS data validation note, presumably due to UK specific privacy rules, is the only slight deviation from perfection.

Reputation 98/100

The site demonstrates a strong, long-standing reputation with a domain age nearing three decades and extensive web archive history. Its moderate global traffic and clean DNS blacklist status further cement its credibility.

Transparency 95/100

Users can easily find contact information and the site is active across multiple popular social media platforms. This level of accessibility and engagement is standard for a major telecommunications provider, making it easy to reach out for support or information.

Compliance 95/100

The presence of clearly defined Privacy Policy and Terms of Service pages shows a commitment to legal and user obligations. This is crucial for any business handling customer data and service agreements.

Infrastructure 95/100

The website is built on a solid technical foundation, with efficient page load times, proper DNS resolution, and advanced email authentication (SPF and DMARC). This ensures reliable service and protects against email spoofing.

Signals Detected

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Tranco Rank: Rank #30665

This site has moderate global traffic

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Structured Data: None found

No structured data markup found

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Trustpilot: No Trustpilot profile

This business has no Trustpilot presence — not unusual for smaller or newer companies

[+]
SSL Certificate: Valid

Valid certificate, expires in 184 days

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Certificate Issuer: DigiCert Ireland Limited

Certificate issued by DigiCert Ireland Limited

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TLS Version: TLS 1.3

Connection uses TLS 1.3

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Certificate Transparency: Unable to check

crt.sh returned status 429

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Branding: Complete

Site has custom branding and social media metadata

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robots.txt: Present

robots.txt has 3 directives and references a sitemap

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Sitemap: 15 pages

Site maintains a proper sitemap with 15 indexed pages

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HSTS Header: Present

Site enforces HTTPS via HSTS

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Content Security Policy: Present

Site has Content Security Policy configured

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Clickjacking Protection: Present

X-Frame-Options: SAMEORIGIN

[?]
Server: Rebus

Web server: Rebus

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Google Web Risk: Clean

No threats detected by Google Web Risk

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Website Status: Online

Website is live and responding

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Contact Info: Found

Website appears to have contact information

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Legal Pages: Privacy & Terms found

Website has both privacy policy and terms of service pages

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Social Media Presence: 4 platforms

Website links to multiple social media platforms

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DNS Resolution: 1 IP(s)

Resolves to: 23.45.237.111

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Email (MX Records): 2 record(s)

Mail servers: cluster3.eu.messagelabs.com., cluster3a.eu.messagelabs.com.

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SPF Record: Present

Domain has SPF email authentication configured

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DMARC Record: Present

Domain has DMARC email authentication configured

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Name Servers: 2 server(s)

DNS providers: udns2.cscdns.uk., udns1.cscdns.net.

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DNS Blacklists: Clean

Not found on any DNS blacklists

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Domain Age: 29 years, 5 months

Domain created 15-Apr-1997 (29 years, 5 months ago)

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Domain Expiry: 15-Apr-2027

Expires in 361 days

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Web Archive History: 24 years

Earliest archive snapshot from 20010720

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Page Load Time: 82ms

Fast page load

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When evaluating a major telecommunications provider like three.co.uk, users typically look for stability, robust security, and clear communication. This site, representing a significant player in the mobile network space, certainly delivers on those fronts. Unlike a small e-commerce site, a telco handles vast amounts of personal data and is expected to uphold the highest standards of security and transparency. three.co.uk's remarkably long domain history, stretching back nearly 30 years, is a powerful indicator of its stability and longevity in the market, far exceeding the typical lifecycle of many online businesses. This deep history, coupled with extensive web archive records, suggests a consistent and established presence, which is exactly what you’d want from a company managing your phone and internet services. The strong security measures, including modern TLS and comprehensive content policies, are also standard for an organization of this scale, protecting user data during interactions. While a minor note about WHOIS data validation is present, it's generally common for large corporations in the UK to have certain anonymization or data protection practices that might trigger such a flag, rather than indicating any malicious intent. For any telecommunications customer, knowing there's readily available contact information and a strong social media presence means support is accessible when needed. Overall, three.co.uk aligns perfectly with what a user would expect from a trusted and professional service provider in its industry.