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kernel.org

Development
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The Linux Kernel Archives Full homepage screenshot

At a glance

Category
Development
Language
English
Paid-content signal
No paid content foundObserved
Registered
1997
Hosting
Akamai Connected CloudInferred
HTTPS certificate trusted
PassedObserved
Last updated

Related questions

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What is kernel.org?
Unknown.
Does kernel.org offer paid content?
Unknown.
What languages does kernel.org support?
Primary language: English.
How can I visit kernel.org?
Use the Visit website link to open the website in a new tab.
What are some alternatives to kernel.org?
Related websites include zustand.docs.pmnd.rs, zustand-demo.pmnd.rs, zulko.github.io, zitadel.com, zipkin.io, zip-codes.com. Compare their features and pricing for your needs.

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Several search or sharing settings need attention. Together they may make snippets, preview images or preferred URLs less consistent across platforms.

Domain and Registration

Registered in 1997, this domain has about 29 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is Gandi SAS, a widely used domain service provider. The domain uses the common .org extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by constellix.com, indicating managed DNS hosting. MX records point to the kernel.org email service. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

The response lacks these common security headers: Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. No obvious internal addresses or debug information were found in the headers. The Server header identifies nginx without an exact version. No explicit CDN or WAF marker was found in the response headers.

Technology Stack Analysis

The public page identifies nginx without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

No homepage meta description was detected, leaving snippet selection more dependent on page text. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. No Open Graph metadata was detected, so social previews may depend on platform inference. The title has 25 characters, within a common display range. The observed directives allow indexing and link following.

Hosting and Email
DNSconstellix.com
HostingAkamai Connected Cloud
Emailkernel.org
Approximate IP geolocation (inferred; a CDN or proxy may differ from the origin server) Canada flagToronto, Ontario, Canada Inferred 172.105.4.254

Registration details

RDAP / WHOIS

RegistrarGandi SAS
Registered1997-03-07
Expires2027-03-08
Domain statusclient transfer prohibited
Nameserversns11.constellix.com、ns21.constellix.com、ns31.constellix.com、ns41.constellix.net、ns51.constellix.net、ns61.constellix.net
DNSSECunsigned

DNS records

DNS

TypeNameValueTTLPriority
Akernel.org172.105.4.254300—
AAAAkernel.org2600:3c04:e001:324:0:1991:8:25269—
MXkernel.orgsmtp1.kernel.org30010
MXkernel.orgsmtp2.kernel.org30010
MXkernel.orgsmtp3.kernel.org30010
NSkernel.orgns11.constellix.com86400—
NSkernel.orgns21.constellix.com86400—
NSkernel.orgns31.constellix.com86400—
NSkernel.orgns41.constellix.net86400—
NSkernel.orgns51.constellix.net86400—
NSkernel.orgns61.constellix.net86400—
TXTkernel.orggoogle-site-verification=nb4Wx5xBQM3b-a3OV2KSlPL786714Y7M6GfBtJf1opQ600—
TXTkernel.orgv=spf1 include:_spf.kernel.org ~all600—
DMARC_dmarc.kernel.orgv=DMARC1; p=quarantine; rua=mailto:[email protected]1800—

TLS and certificates

TLS / SSL

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjecttor.source.kernel.org
IssuerLet's Encrypt
Valid until2026-11-12T20:48 · Remaining when checked: 48 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HTTP

HeaderValue
content-typetext/html; charset=utf-8
servernginx
strict-transport-securitymax-age=15768001
content-security-policydefault-src 'self' *.kernel.org; img-src https: data:
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policysame-origin

Identified technologies
nginx

Pages, Search and Sharing
Meta descriptionNot detected
Canonical URLNot detected
LanguageEnglish (default)
Twitter CardNot detected

Social Sharing Preview

Unknown

robots.txt (opens in a new tab)

HTTP 404

No robots.txt found

Sitemaps

0

No sitemaps found

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