nctm.org

We performed a comprehensive analysis of nctm.org on 2026-06-29. The website returned an HTTP 200 status code with a server response time of 23991ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 199 KB, and the site is served behind a CDN (Content Delivery Network). The website uses a secure HTTPS connection with a valid SSL certificate issued by Google Trust Services (DV type). The connection is encrypted using TLS 1.3 with the TLS_AES_256_GCM_SHA384 cipher suite and ECDSA-SHA256 signature algorithm. The certificate covers 2 domain(s) (Subject Alternative Names) and expires on 2026-09-18, which is 81 days from now. The security headers analysis reveals a score of 85/100 (good). The following security headers are properly configured: Content-Security-Policy, Strict-Transport-Security (HSTS), X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. However, the site is missing X-Frame-Options, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 10 technologies across 8 categories powering nctm.org. The detected stack includes Bootstrap, Google Analytics 4, Google Tag Manager, Meta Pixel, LinkedIn Insight Tag, Twitter Pixel, Cloudflare, Google Fonts, jQuery, and WP Rocket. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, nctm.org receives an overall trust score of 82/100, classified as "Very Likely Safe".

After conducting a thorough safety and legitimacy analysis, nctm.org receives a trust score of 82/100, 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 Google Trust Services with 81 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, DMARC email authentication with a quarantine policy, DNSSEC providing authenticated DNS responses, and a well-established domain registered for over 31.2 years, indicating long-term commitment and legitimacy. Areas of concern include: no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking) and 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 nctm.org 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. The domain is registered through NameCheap, Inc. based in CA, with a registration date of 1995-05-03 and expiration date of 2031-05-04.

Our technology detection engine scanned nctm.org and identified 10 distinct technologies across 8 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 — provides the styling and responsive layout system for nctm.org. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for nctm.org. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for nctm.org. Advertising: Meta Pixel, LinkedIn Insight Tag, and Twitter Pixel — handles advertising pixel tracking and conversion measurement for nctm.org. CDN: Cloudflare — accelerates content delivery by caching assets at edge locations worldwide for nctm.org. Fonts: Google Fonts — delivers web fonts for typography for nctm.org. JavaScript Library: jQuery — provides utility functions and DOM manipulation for nctm.org. Performance: WP Rocket — optimizes page loading speed and performance for nctm.org. We also extracted the following tracking identifiers: Google Tag Manager container GTM-MWPGCX and Meta (Facebook) Pixel ID 183690092499024. These IDs can be used to identify other websites operated by the same organization.

nctm.org delivers its homepage in 23991ms (server response time), which is considered slow by industry standards. The total page weight is 199 KB, and we detected 308 resource requests loading assets from 20 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 8 CSS files and 6 out of 26 JavaScript files are minified. Minifying the remaining 26 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. The site is served through a Content Delivery Network (CDN), which caches static assets at edge servers around the world. This means visitors from different geographic regions receive content from the nearest edge server, significantly reducing latency. CDN usage is particularly important for websites with a global audience, as it can reduce page load times by 40-60% for distant visitors. From an environmental perspective, each page view of nctm.org produces approximately 0.1g 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 199 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for nctm.org. 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.

nctm.org resolves to the IPv4 address 172.66.43.71 and also supports IPv6 (2606:4700:3108::ac42:28b9), demonstrating modern network infrastructure readiness. The domain has 2 A record(s) configured. The domain name system is managed by 2 name servers: kay.ns.cloudflare.com and sam.ns.cloudflare.com. Having 2 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 nctm.org is handled by Microsoft 365 with 1 MX records configured: nctm-org.mail.protection.outlook.com. 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 quarantine policy — a moderate setting, directing unauthorized emails to spam/junk folders. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is enabled for nctm.org, 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 domain is registered through NameCheap, Inc. (CA). It was first registered on 1995-05-03 and is set to expire on 2031-05-04, making it 31.2 years old. Our subdomain enumeration scan discovered 2 active subdomains for nctm.org: api.nctm.org and www.nctm.org. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of nctm.org contains 857 words of visible text content. This is a moderate amount of content. The page is structured with 5 H2 headings, 1 H3 headings, 5 H4 headings, 6 H5, and 0 H6 headings. The page includes 19 images. 15 images (79%) are missing alt text attributes, which is a significant concern for both accessibility and SEO. Screen readers rely on alt text to describe images to visually impaired users, and search engines use alt text to understand image content. Only 21% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 202 internal links pointing to other pages on the same domain and 40 external links pointing to third-party websites. The high number of internal links suggests a well-interconnected site structure, which helps search engines discover and crawl all pages efficiently. There are 26 external JavaScript files, 8 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) and robots.txt (controls search engine crawling behavior). Notable missing features: Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility. The website has social media presence across 7 platforms: Facebook (@tr), Twitter (@uwt.js), Instagram (@nctm.math), Linkedin (@214550), Youtube (@NCTMChannel), Tiktok (@nctm.math), and Pinterest (@nctmpins). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for nctm.org is well-optimized at 51 characters: "Index - National Council of Teachers of Mathematics". 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): "Founded in 1920, the National Council of Teachers of Mathematics (NCTM) is the largest organization in the world dedicat...". 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 page language is declared as en and a favicon is configured. No Open Graph tags are configured. When someone shares a link to nctm.org on social media, the platform will have to guess the title, description, and image — often producing unattractive or inaccurate previews. Adding OG tags is essential for social media marketing. The meta keywords tag contains 17 terms including Mathematics, Classroom Resources, Lesson Plans, Elementary, and Middle School. 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.