🌐 w3c.com ⚠ SSL Issue
Checked: just now 🔗 Visit site
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
N/A
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
N/A
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
N/A
Hosting ?The company and location where this website's server is physically located.Read more →
Unknown
Security ?Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
0/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
216.239.34.21
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
N/A
Uptime
N/A
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
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Performance data not available yet.

🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools.
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No technologies detected

📸 Screenshot Processing...
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Screenshot is being captured...

🌐 DNS Records ?DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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A (IPv4)216.239.38.21216.239.32.21216.239.34.21216.239.36.213.33.251.16815.197.225.128
NSns53.domaincontrol.comns54.domaincontrol.com
MX10 alt3.aspmx.l.google.com10 alt4.aspmx.l.google.com5 alt1.aspmx.l.google.com1 aspmx.l.google.com5 alt2.aspmx.l.google.com
TXT (3)
Services configured via TXT:
Google
+1 other TXT record(s)
Show all TXT records
v=spf1 include:dc-aa8e722993._spfm.w3c.com ~all
anthropic-domain-verification-ev9gnr=wvexhhTT0Hf9tCegDhavzpLS7
google-site-verification=qoIx-_mbK6fa1fgVJPKpYu54BTmsFayfFZVJUesiE1k
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarN/A
RegisteredN/A
ExpiresN/A
Last UpdatedN/A
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Invalid / Missing
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Subject (CN)N/A
IssuerN/A
Valid FromN/A
Valid UntilN/A
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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StatusN/A
ServerN/A
Content-TypeN/A
Final URLhttps://w3c.com/
Security headers ?HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
HSTS
Content-Security-Policy
X-Frame-Options
🏠 Hosting ?Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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IP Address216.239.34.21
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score F (0/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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No robots.txt
This site has no robots.txt file, so crawlers may access everything by default.
Sitemap Not found
🔗 Social & Meta Tags
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No meta tags detected.

📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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SPF✓ Present
v=spf1 include:dc-aa8e722993._spfm.w3c.com ~all
DMARC✓ Present
v=DMARC1; p=quarantine; adkim=r; aspf=r; rua=mailto:[email protected];
MX Records
10 → alt3.aspmx.l.google.com
10 → alt4.aspmx.l.google.com
5 → alt1.aspmx.l.google.com
1 → aspmx.l.google.com
5 → alt2.aspmx.l.google.com
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 16 active 5 for sale 2 available
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.com current
.net ●
.org ●
.info taken
.io ●
.co ●
.dev Available
.app ●
.me taken
.biz ●
.eu ●
.xyz taken
.fi ●
.se ●
.de taken
.uk ●
.fr ●
.nl taken
.es ●
.it ●
.us ●
.ca ●
.com.au Available
.co.uk ●
📡 Uptime Monitor
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Not checked yet — data will appear after the first monitoring run.