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  6. HTTP Headers 

3W1 strongly recommends „White Hat SEO” – learn why it's good for your website, while „Black Hat SEO” is not.

17 HTTP Headers from https://www.w3.orgWith a configurable User Agent String, referring URL (referer) and cookies


  1. HTTP/2 200
  2. date: Thu, 23 Oct 2025 00:14:02 GMT
  3. content-type: text/html; charset=UTF-8
  4. cf-ray: 992d08337919b084-FRA
  5. cache-control: public, s-maxage=86400
  6. x-strata-cache-tags: global,homepage,blogListing,pressReleasesListing,eventsListing,newsListing,ecosystemsLandingPage,blogPosts,newsArticles,pressReleases,members
  7. x-frontend-content: PUBLISHED
  8. vary: Origin
  9. x-backend: sf-frontend
  10. x-request-id: 992803c6199aa657
  11. strict-transport-security: max-age=15552000; includeSubdomains; preload
  12. content-security-policy: frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests
  13. cf-cache-status: HIT
  14. age: 52609
  15. set-cookie: __cf_bm=G7OR13NwkC4LuOsbZiC3SE7SFyymgF4fe0Kw6kRL.ks-1761178442-1.0.1.1-8Jku6b0qjUIJnZ2.bM80gZAubACRSd9_H7dGXPu0djR2QMApTlCvcJRuNOfB4oiyf0JNpPB3ZTFsyhZeAc2UvEXGTlLdOGyaV2Nyyfsuq4g; path=/; expires=Thu, 23-Oct-25 00:44:02 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None
  16. server: cloudflare
  17. alt-svc: h3=":443"; ma=86400

Latest HTTP Headers requests list 30 URLs with HTTP status codes


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