Koorsen.com is the online presence of a company that has owned this domain since 1998, which is a strong signal of legitimacy. Most professional services firms with that kind of history are well-established. However, the website itself is unusual: the homepage is not accessible to regular browsers (it returns a 403 error), and our automated checks couldn't retrieve common pages like an about or contact page. That doesn't mean the company is fake — it means their site is configured to block almost all visitors who aren't already inside their network or logged in. For a fire protection or security service company, this is rare and inconvenient for potential customers trying to get information online. If you found this site while looking for a known company like Koorsen Fire & Security, you can likely trust their offline reputation. But if you're trying to decide whether to use their services, it's best to call their phone number from a verified source (like a previous invoice or a business directory) before sharing any personal details. Overall, the domain history and clean security record suggest this is not a scam site, but the closed-off website means you should proceed with standard caution for any online business you haven't dealt with before.
In plain English
Koorsen.com appears to be a legitimate website that's been around for nearly three decades. That's a great sign. The main issue is that the site itself is heavily locked down — the homepage just says '403 Forbidden' and automated checks couldn't get past its bot protection. So while the business behind it is likely real, the website offers very little to reassure casual visitors. If you know the company from offline sources, it's probably safe. If you're just browsing, you may want to verify their phone number or address elsewhere first.
Where the score comes from
The site uses a valid SSL certificate with modern encryption, but it does not set standard browser protections that prevent clickjacking and enforce secure connections. That's a common gap, not a dealbreaker for a service company, but worth noting.
This domain has been registered for 28 years, which is a strong sign of a real, established business. However, we couldn't confirm who owns it or find an about page, partly because the site blocks automated checks. The age gives it credibility, but the identity isn't fully transparent.
No blacklist hits, no Google Safe Browsing warnings, and the domain enforces strict email authentication. A clean reputation backed by a very long web history.
The website is heavily protected by bot detection, so we couldn't verify contact info, an about page, or social media presence. The homepage returns a 403 error, which means even human visitors might not see content without special access. For a legitimate service company, this is unusually closed off.
No privacy policy or terms of service were found by our scan. For a US-based professional services firm, this is not unusual, but it still means less legal transparency than a European customer might expect.
Solid technical setup: fast hosting via Cloudflare, good email authentication, and clean DNS configuration. Missing DNSSEC is minor and typical for many businesses.
What we checked
Run this site? Show your score.
Add a trust badge so visitors can see your live score for themselves.
Get your badge →