No threats detected
All checks passed. This site appears legitimate — but always stay alert for phishing even on trusted domains.
Is secure.castlinesystems.co.uk legit or a scam?
This looks safe to use.
Official secure subdomain of established UK electrical software firm Castline Systems serving a software update file.
Analysis Summary
Website Preview
Automated page render — captured in a safe sandbox. What an ordinary visitor would see when loading the site.
Visual analysis
We capture a fresh screenshot of the live page and ask a vision model to look for scam visual patterns — fake trust badges, countdown timers, overlay pop-ups, and visual clones of legitimate brands.
Visual similarities noted — cleared by the overall checks
Our vision model noted some visual similarity to a known brand, but the domain, security records, and reputation checks confirm this is the legitimate site — so this is shown for transparency, not as a red flag.
What our vision model saw
1 signalScreenshot incomplete — site may be slow to render
Intelligence
The domain secure.castlinesystems.co.uk belongs to Castline Systems, a UK company founded in 1989 that develops electrical design software. Our antivirus network returned zero detections across 92 engines and the hosting IP shows no abuse history. The domain itself is over 21 years old with a valid GlobalSign certificate. Business registration records confirm the company is active in West Sussex with physical offices and support contacts. No scam reports, complaints, or clone indicators appear in our research. The URL points to an update.exe file consistent with legitimate software distribution.
Web Research Findings
Our live research agent queries scam-report databases, consumer-review sites, news coverage, and general web search for secure.castlinesystems.co.uk, then cross-checks business-registration records and look-alike domain patterns. Everything below is pulled from what it actually found.
- Castline Systems is a legitimate UK-based software company established in 1989, specializing in electrical design and certification software.
- The domain 'secure.castlinesystems.co.uk' is an official subdomain used by the company for its software services, including firewall/proxy exceptions for their 'CableCalc' product.
- The company provides professional software tools such as CableCalc and FormFill, which are widely recognized in the UK electrical industry.
- Official support is provided via email at support@castlinesystems.co.uk and the company maintains a physical office in Horsham, West Sussex.
- No evidence of scam activity, phishing, or malicious intent was found associated with this domain.
Castline Systems is a long-standing developer of electrical industry software (CableCalc, FormFill) based in Rusper, West Sussex.
Our research found that Castline Systems is a legitimate UK-based software company established in 1989, specializing in electrical design and certification software. The domain 'secure.castlinesystems.co.uk' is an official subdomain used by the company for its software services. No evidence of scam activity, phishing, or malicious intent was found associated with this domain.
Domain Timeline
- Mar 11, 2005Domain registered
First appeared in WHOIS records — 21 years old today.
- Jul 21, 2026Latest security review — Reviewed as safe
This scan re-ran every check and found no active threat signals.
secure.castlinesystems.co.uk has operated for years with no threat signals in this review — a long, stable track record, though it is never a guarantee on its own.
Threat Detection
Antivirus Engines
Security Scans
Checked against the major public blocklists used by browsers and security tools — no hits.
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
Technical Details
domain · encryption · redirects · server reputation · referencedThe plumbing behind the site — who registered it, how it’s encrypted, where it’s hosted, and where it links out. A valid certificate or a calm server doesn’t mean the business is honest — scam sites pass these checks too. Use this to corroborate the verdict, not to overturn it.
Domain & Encryption
Server Reputation
What to do
Still, stay alert
No major threat indicators — but a clean scan does not guarantee every page is safe, and phishing emails routinely spoof real domains.
- Double-check the exact URL in your address bar
Confirm you are actually on secure.castlinesystems.co.uk and not a lookalike like s-ecure.castlinesystems.co.uk.com or an IDN homoglyph.
- Use a password manager
Password managers only auto-fill on the exact domain they were saved for — they refuse to fill lookalike domains, which is the single best phishing defence.
- OpenDiscuss this site on the forum
If you have first-hand experience with this site — good or bad — share it with the MalwareTips community.
Final Verdict
This is the secure subdomain of Castline Systems, a legitimate UK software company. The file is hosted on a 21-year-old domain with clean scans and no scam reports.
Safety FAQ
Common questions, answered directly from the scan data above — so the answers always reflect the latest verdict on this page.
- Our automated security review found no threat indicators on secure.castlinesystems.co.uk, so it appears legitimate. All 92 antivirus engines we queried report it clean, and the domain is 21.4 years old, registered on March 11, 2005 — established domains are far less likely to be scams. Even so, always double-check the exact address in your browser, because phishing emails routinely spoof real, trusted domains like this one.
- secure.castlinesystems.co.uk passed our automated checks with a trust score of 88/100. No antivirus engines or major blacklists flagged it at the time of the last scan, and its signals line up with an established, legitimate site. Treat any unexpected login prompt or payment request on it with the same caution you would anywhere.
- Yes — and this is worth understanding. Even trustworthy domains get spoofed in phishing emails (a fake message that only looks like it's from secure.castlinesystems.co.uk), and legitimate sites are occasionally compromised on specific pages. A clean verdict means the site itself checks out today; it does not mean every email or link claiming to be from secure.castlinesystems.co.uk is genuine. Always reach the site by typing the address yourself rather than clicking links in unexpected messages.
- No — all 92 antivirus and blocklist engines in our malware network currently report secure.castlinesystems.co.uk as clean. That's a good sign, though antivirus coverage is only one of the many signals we weigh, and brand-new scam sites can appear clean before vendors catch up.
- No — secure.castlinesystems.co.uk is not currently on the major browser blocklist feeds that Chrome, Safari, Firefox, and Edge rely on. Note that blocklists can lag behind brand-new scam domains, so "not listed" is reassuring but not a guarantee on its own.
- secure.castlinesystems.co.uk is 21.4 years old, registered on March 11, 2005 through 123-Reg Limited t/a 123-reg. A multi-year registration history is one of the stronger signals against a scam, though it's never a guarantee on its own — established domains can still be misused.
- Yes — secure.castlinesystems.co.uk presents a valid TLSv1.2 certificate issued by GlobalSign nv-sa · GlobalSign GCC R6 AlphaSSL CA 2025, valid for another 153 days. Important caveat: SSL only encrypts the connection between you and the site — it does not verify who runs it. Almost all scam sites now have valid SSL too, so a padlock alone never means "safe".
- secure.castlinesystems.co.uk resolves to an IP operated by Iomart Managed Services Limited in GB (Data Center/Web Hosting/Transit). Hosting location alone doesn't make a site good or bad — but hosting that doesn't match a brand's claimed country, or that sits on networks known for abuse, is one of the many signals we weigh alongside the verdict above.
- This report is a record of the scan run on July 21, 2026, and the verdict reflects that point in time. Scam sites change fast — they can go live, get flagged, or vanish within days — so if you believe something about secure.castlinesystems.co.uk has changed, MalwareTips staff can run a fresh scan that re-checks every signal from scratch and republishes an updated verdict.
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