🌐 kernel.io 200 🔒 SSL Valid
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 →
200
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 71d
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 →
1/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
172.67.147.196
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. 2
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🌐 CDN
Cloudflare
🔤 Font/Icon
Google Fonts
📸 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)172.67.147.196104.21.28.230
AAAA (IPv6)2606:4700:3037::ac43:93c42606:4700:3032::6815:1ce6
NSaryanna.ns.cloudflare.commatteo.ns.cloudflare.com
MX12 route2.mx.cloudflare.net22 route3.mx.cloudflare.net75 route1.mx.cloudflare.net
TXT (2)
+1 other TXT record(s)
Show all TXT records
f02a4cca68cf28f079c1bb75185a3830c2821ed6
v=spf1 include:_spf.mx.cloudflare.net include:relay.mailchannels.net -all
📋 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 → Valid
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Subject (CN)kernel.io
IssuerLet's Encrypt
Valid From2026-09-28
Valid Until2026-12-27 (71 days left)
SANs (2)kernel.iowww.kernel.io
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status200
Servercloudflare
Content-Typetext/html; charset=utf-8
Final URLhttps://kernel.io/
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
permissions-policygeolocation=(), microphone=(), camera=()
cache-controlpublic, max-age=300
cf-raya4b7acd48cad43ed-EWR
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 Address172.67.147.196
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score B (5/7)
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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 Partial
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Titlekernel.io is for sale
Descriptionkernel.io is available for acquisition. Secure transaction via Escrow.com. Serious offers only.
Languageen
📧 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:_spf.mx.cloudflare.net include:relay.mailchannels.net -all
DMARC✓ Present
v=DMARC1; p=none; rua=mailto:[email protected]
MX Records
12 → route2.mx.cloudflare.net
22 → route3.mx.cloudflare.net
75 → route1.mx.cloudflare.net
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 18 active 4 for sale 1 available
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.com ●
.net ●
.org ●
.info ●
.io current
.co ●
.dev ●
.app taken
.me ●
.biz ●
.eu ●
.xyz taken
.fi taken
.se ●
.de taken
.uk ●
.fr ●
.nl ●
.es ●
.it ●
.us ●
.ca Available
.com.au ●
.co.uk ●
📡 Uptime Monitor
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Not checked yet — data will appear after the first monitoring run.