lac.cz

We performed a comprehensive analysis of lac.cz on 2026-07-03. The website returned an HTTP 200 status code with a server response time of 22308ms. The page is served over HTTP/2 protocol, however no compression (Gzip or Brotli) is enabled, which means the page is transferred at its full uncompressed size. The total page weight is 34 KB. The website uses a secure HTTPS connection with a valid SSL certificate issued by Let's Encrypt (DV type). The connection is encrypted using TLS 1.2 with the ECDHE-RSA-AES256-GCM-SHA384 cipher suite and sha256WithRSAEncryption signature algorithm. The certificate covers 1 domain(s) (Subject Alternative Names) and expires on 2026-08-07, which is 35 days from now. The security headers analysis reveals a score of 100/100 (excellent). The following security headers are properly configured: Content-Security-Policy, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. All recommended security headers are in place, providing comprehensive protection against common web attacks. Our technology detection scan identified 5 technologies across 5 categories powering lac.cz. The detected stack includes Bootstrap 3.3.5, Google Tag Manager, StackPath, Adobe Fonts, and jQuery. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, lac.cz receives an overall trust score of 84/100, classified as "Very Likely Safe".

After conducting a thorough safety and legitimacy analysis, lac.cz receives a trust score of 84/100, which places it in the "Very Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, HSTS (HTTP Strict Transport Security) enforcement preventing protocol downgrade attacks, a valid SSL certificate issued by Let's Encrypt with 35 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, DMARC email authentication with a reject policy — the strongest available setting, and DNSSEC providing authenticated DNS responses. Areas of concern include: the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked lac.cz against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned lac.cz and identified 5 distinct technologies across 5 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. CSS Framework: Bootstrap (version 3.3.5) — provides the styling and responsive layout system for lac.cz. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for lac.cz. CDN: StackPath — accelerates content delivery by caching assets at edge locations worldwide for lac.cz. Fonts: Adobe Fonts — delivers web fonts for typography for lac.cz. JavaScript Library: jQuery — provides utility functions and DOM manipulation for lac.cz. We also extracted the following tracking identifiers: Google Tag Manager container GTM-K4QNTC. These IDs can be used to identify other websites operated by the same organization.

lac.cz delivers its homepage in 22308ms (server response time), which is considered slow by industry standards. The total page weight is 34 KB, and we detected 151 resource requests loading assets from 9 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. No compression is currently enabled on lac.cz. Enabling Brotli or Gzip compression could reduce page size by 60-80% for text-based assets (HTML, CSS, JavaScript), significantly improving load times and reducing bandwidth costs. This is one of the simplest and most impactful performance optimizations available. Asset minification status: 0 out of 15 CSS files and 5 out of 27 JavaScript files are minified. Minifying the remaining 37 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. From an environmental perspective, each page view of lac.cz produces approximately 0.02g of CO₂, earning a carbon rating of A. This places the website among the cleanest on the web, demonstrating efficient use of server resources and optimized content delivery. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 34 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for lac.cz. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

lac.cz resolves to the IPv4 address 217.198.121.163, but does not support IPv6. IPv6 adoption is increasingly important as IPv4 address space becomes exhausted, and some ISPs and regions are transitioning to IPv6-only connectivity. The domain has 1 A record(s) configured. The domain name system is managed by 3 name servers: ns1.regzone.cz, ns1.regzone.de, and ns1.regzone.info. Having 3 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for lac.cz is handled by lac.cz with 1 MX records configured: mail.lac.cz. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a reject policy — the strongest setting, instructing receiving servers to reject unauthorized emails entirely. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is enabled for lac.cz, providing an additional layer of security by cryptographically signing DNS records. This prevents DNS cache poisoning and man-in-the-middle attacks that could redirect visitors to malicious websites.

The homepage of lac.cz contains 582 words of visible text content. This is a moderate amount of content. The page is structured with 5 H2 headings, 7 H3 headings, 0 H4 headings. The page includes 2 images. All images have proper alt text attributes ✓, which is excellent for both accessibility (screen readers) and SEO (search engines can understand image content). The link structure consists of 94 internal links pointing to other pages on the same domain and 5 external links pointing to third-party websites. There are 27 external JavaScript files, 15 CSS stylesheets, and 1 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages), robots.txt (controls search engine crawling behavior), and Schema.org structured data (Organization). The website has social media presence across 3 platforms: Facebook (@firma.lac), Linkedin (@lac-cz), and Youtube (@UCqnuzkl7ARn4VyO63jtfXJA). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for lac.cz is well-optimized at 38 characters: "Pece a sušárny | Žárobetonové tvarovky". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 160 characters (acceptable): "Potřebujete průmyslovou pec nebo tepelné zařízení na zakázku? Hledáte žárobetonové tvarovky a litou keramiku? Kontaktujt...". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The canonical url is correctly set to https://www.lac.cz/cs/, preventing duplicate content issues and a favicon is configured. Open Graph meta tags are configured with 4/4 recommended fields: OG title ("Pece a sušárny | Žárobetonové tvarovky..."), OG description, OG image (social sharing thumbnail), OG type (article). These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol. The site implements Schema.org structured data with the following types: Organization. Structured data helps search engines understand the page content and can enable rich results (featured snippets, knowledge panels, star ratings) in Google search results, which can significantly increase click-through rates. The meta keywords tag contains 22 terms including LAC, LAC s.r.o., LAC, s.r.o., and LAC Židlochovice. Note: Google has officially confirmed that it does not use the meta keywords tag as a ranking signal. However, some other search engines (Bing, Yandex) may still reference it.