check web redirect url status code checker

Check server response of

Server response
NS records
Whois domain
Response headers
Request headers
Raw HTML code
403 Forbidden - 21xr.com
HTTP Status: 403
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Content-Type: text/html; charset=utf-8
Server: ADM/2.1.1
Connection: close
Content-Length: 1027

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: 21xr.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head><title>404 Object not found</title></head>
<body>
<h1>Object not found</h1>
<p>Your browser sent a request that this server could not found.<br /></p>
<hr><address>Knstat/2.1.1</address>
<p></p> 
<hr>
<strong><span style="font-size:16px;">尊敬的客户，您的页面可能由于以下原因暂停访问：</span><br />
</strong><br />
<blockquote style="margin:0 0 0 40px;border:none;padding:0px;">
	<span style="font-size:16px;">1、未按照工业和信息化部要求进行网站ICP备案，请通过工信部官网，检查域名的备案情况【https://beian.miit.gov.cn/】</span><br>
        <span style="font-size:16px;">2、该页面存在疑似违规信息。如您有任何疑问，请您联系010-62692880-1600.</span> 
</blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px;">
	 
</blockquote>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px;">
	<span style="font-size:16px;"></span>
</blockquote>
</body>
</html>

Whois info of domain