1sudoku.com

🤖 AI Summary

After conducting a thorough safety and legitimacy analysis, 1sudoku.com receives a trust score of 53/100, which places it in the "Caution Advised" 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. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking), missing Referrer-Policy, potentially leaking URL information to third parties, the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity, and DNSSEC is not enabled, leaving DNS queries vulnerable to spoofing attacks. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked 1sudoku.com 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.

🤖 AI Summary

Our technology detection engine scanned 1sudoku.com and identified 2 distinct technologies across 2 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for 1sudoku.com. Advertising: Google AdSense — handles advertising pixel tracking and conversion measurement for 1sudoku.com. We also extracted the following tracking identifiers: Google Analytics 4 Measurement ID G-3HPG1KJM1V. These IDs can be used to identify other websites operated by the same organization.

🤖 AI Summary

1sudoku.com delivers its homepage in 11238ms (server response time), which is considered slow by industry standards. The total page weight is 13 KB, and we detected 57 resource requests loading assets from 2 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. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 2 out of 2 CSS files and 0 out of 2 JavaScript files are minified. Minifying the remaining 2 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 1sudoku.com produces approximately 0.01g 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 13 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for 1sudoku.com. 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.

🤖 AI Summary

1sudoku.com resolves to the IPv4 address 145.239.37.162 and also supports IPv6 (2001:41d0:301::30), demonstrating modern network infrastructure readiness. The domain has 1 A record(s) configured. The domain name system is managed by 4 name servers: ns-a.ecritel.com, ns-a.ecritel.fr, ns-b.ecritel.com, and ns-b.ecritel.fr. Having 4 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 1sudoku.com is handled by e-sudoku.fr with 1 MX records configured: mail.e-sudoku.fr. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF is not configured, meaning any server could potentially send emails pretending to be from this domain. This is a significant email security concern. DMARC is not configured, leaving the domain vulnerable to email spoofing and phishing attacks that impersonate this domain. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is not enabled for 1sudoku.com. While not critical for most websites, DNSSEC adds an important security layer by ensuring DNS responses haven't been tampered with during transit. Enabling DNSSEC is recommended for domains handling sensitive data or financial transactions. Our subdomain enumeration scan discovered 2 active subdomains for 1sudoku.com: m.1sudoku.com and www.1sudoku.com. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

🤖 AI Summary

The homepage of 1sudoku.com contains 189 words of visible text content. This is a relatively short page — adding more descriptive content could improve search engine visibility. The page is structured with 7 H2 headings, 0 H3 headings, 0 H4 headings. The page includes 5 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 28 internal links pointing to other pages on the same domain and 0 external links pointing to third-party websites. There are 2 external JavaScript files, 2 CSS stylesheets, and 0 iframes on the page. The site implements the following web standards and features: Schema.org structured data (Game and PeopleAudience), Progressive Web App (PWA) manifest (enabling app-like installation), and AMP (Accelerated Mobile Pages) version. Notable missing features: XML Sitemap and robots.txt. Adding these could improve search engine discoverability and rich result eligibility. We detected the following payment methods accepted on 1sudoku.com: Discover. Offering multiple payment options including credit cards and digital wallets improves customer trust and can increase conversion rates.

🤖 AI Summary

The title tag for 1sudoku.com is well-optimized at 32 characters: "Sudoku - Play free Sudoku online". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 219 characters (slightly long): "Just click & Play sudoku online for free on mobile, tablet or computer, with 5 difficulty levels: easy, medium, hard, ex...". 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://1sudoku.com/, preventing duplicate content issues, the page language is declared as en, and a favicon is configured. Open Graph meta tags are configured with 4/4 recommended fields: OG title ("Sudoku - Play free Sudoku online..."), OG description, OG image (social sharing thumbnail), OG type (siteweb). 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: Game and PeopleAudience. 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.

🤖 AI Summary

Related domain discovery works by finding other websites that share the same IP address, Google Tag Manager container ID, Google Analytics property, or advertising pixel IDs with 1sudoku.com. This data becomes available after batch-crawling the domain database — individual domain lookups cannot populate this section. We extracted the following tracking IDs that can be used for cross-referencing: ga4_id: G-3HPG1KJM1V.