言語

Hosting Checker

Free, no signup. See which public network and edge platform a domain exposes — and the specific DNS or response-header evidence for it.

Built by Patrick Stox

Checks run from our server; we fetch the URL you enter and don't keep the results. This queries public DNS and makes one public web request. A CDN or reverse proxy can hide the origin provider; this tool never treats edge evidence as proof of the origin. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.

Feedback
Report a bug

Found something broken in Hosting Checker? Let us know what happened — this goes straight to a private triage queue, not a public list.

What will be sent 
 No tool inputs, uploads, pasted source, complete results, query parameters, or URL fragments are attached automatically. You can edit or remove the selected passage above. Browser and anti-abuse metadata is processed for spam prevention. 
  
 
  
 
 
  
 
 
  
 
Sample report
Illustrative example — fixed public signals, not a domain lookup
Cloudflare is proxying this site; the origin host is not visible from this public check.
  • Evidence: server: cloudflare and cf-ray were present.
  • IP & network: the displayed addresses belong to the public edge network.
  • DNS & mail: an MX answer is listed separately and is not called the web host.
  • Transfer: Content-Encoding: br means Brotli was observed on this response.
 
 
 
How to use it
  1. Enter a bare domain such as example.com.
  2. Choose Check hosting and read the delivery verdict with its evidence.
  3. Separate the observed IP network, CNAME, and response-header fingerprints from the mail-host MX records.
  4. If a proxy is detected, treat the origin as unknown unless you can verify it through your own account or configuration.
 
 
     
 Local data 
Saved targets, named lists, and recent check summaries remain only in this browser.
 
   
 
     
How to read the result
  • Delivery verdict summarizes the strongest supported edge or ASN evidence.
  • Origin not visible means a proxy or edge platform terminates the public request.
  • IP network is the ASN organization for the observed A/AAAA address, not necessarily the hosting brand.
  • CNAME and MX are raw public DNS answers; MX describes email.
 
Data sources & freshness
The endpoint performs bounded public A/AAAA, CNAME, and MX lookups and one web request. Team Cymru ASN DNS data enriches observed IPs with network organization, registry, and country. A deterministic fingerprint table checks selected headers and CNAMEs for supported edge platforms, while transfer inspection reports compression and only documented protocol hints.
 
Features
  • Public IP, ASN, CNAME, and MX evidence in one report.
  • Supported CDN and edge fingerprints from DNS and headers.
  • Compression and protocol-hint summary.
  • Explicit distinction between delivery network, origin host, and mail host.
 
Limitations
A Cloudflare, Fastly, or similar result describes the public edge and may conceal the origin. ASN country is not a physical server location. Private DNS, multi-CDN routing, geographic answers, reseller relationships, and infrastructure without a supported fingerprint can make the picture incomplete.
 
Frequently asked questions
Can a hosting checker identify the origin host behind Cloudflare?
Usually not. A reverse proxy publishes its own edge IPs and headers while deliberately hiding the origin. The checker reports Cloudflare as the delivery layer and leaves the origin unclaimed.
Is the reported country the server location?
No. Country and registry values come from public ASN data for the observed IP network. They are not proof of the physical datacenter, origin server, or where site data is stored.
Why does the tool show a CDN instead of my web host?
Public DNS and HTTP requests terminate at the CDN or edge proxy when one is configured. That is the infrastructure visible to visitors; the underlying host may not expose a public fingerprint.
Does the MX record show who hosts the website?
No. MX records describe mail delivery. The report lists them separately because email and web hosting are often provided by different companies.
Next stepHTTP Header Checker — verify it with a direct check.

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Feature requests for Hosting Checker
 

Upvote what you want most. New ideas can be submitted from the floating Feedback menu;
      requests appear here once approved, and the most-wanted rise to the top.

   
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ツールについて
プロキシがオリジンを明らかにすると装わず、ドメインの公開IPネットワーク、CDNまたはエッジプラットフォーム、DNSとメールホストの証拠、レスポンス転送の事実を確認します。
機能
  • 公開IPとネットワーク情報
  • CDN・エッジの手掛かり
  • DNS・メールホストの証拠
  • レスポンス転送の事実
仕組み
ドメインを解決し、公開DNS、レスポンスヘッダー、転送情報を出典別に収集します。観測値と推測できない項目を分け、プロキシの背後を断定しません。
制限事項
  • 公開DNS、レスポンス、ネットワーク情報だけを観測し、プロキシの背後にあるオリジン、内部構成、所有者、セキュリティを推測しません。
  • IP、CDN、メール、転送の情報は時間や地域で変わる可能性があります。
よくある質問
オリジンサーバーを見つけられますか？
いいえ。公開情報から見えるネットワークやCDNの手掛かりを示すだけで、プロキシの背後のオリジンを推測しません。
CDNを確定できますか？
検出できるフィンガープリントを示しますが、カスタム構成や複数層では確定できない場合があります。
メールホストを確認できますか？
公開DNSなどに現れるメールホストの証拠を表示しますが、配送、認証、内部システムは保証しません。