check web redirect url status code checker

Check server response of

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NS records
Whois domain
Response headers
Request headers
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403 Forbidden - gkctf.com
HTTP Status: 403
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Server: nginx
Date: Wed, 14 May 2025 08:26:31 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding

HTTP Code 403 Forbidden

403 Forbidden indicates that access to the requested resource is denied, even with authentication.

When is Code 403 used?

  • When accessing restricted content without necessary permissions
  • When security rules block a request
  • When an IP address is banned

What does Code 403 mean for the user?

The user is informed that they do not have permission to access the resource.

GET / HTTP/1.1
Host: gkctf.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

Whois info of domain

Domain Name: GKCTF.COM
Registry Domain ID: 2964484810_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.55hl.com
Registrar URL: http://www.55hl.com
Updated Date: 2025-05-01T10:50:19Z
Creation Date: 2025-03-04T19:36:48Z
Registry Expiry Date: 2026-03-04T19:36:48Z
Registrar: Jiangsu Bangning Science & technology Co. Ltd.
Registrar IANA ID: 1469
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +86.02586883421
Domain Status: ok https://icann.org/epp#ok
Name Server: NS1.JUDNS.COM
Name Server: NS2.JUDNS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-14T08:26:09Z <<<
For more information on Whois status codes, please visit https://icann.org/epp
NOTICE: The expiration date displayed in this record is the date the
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