check web redirect url status code checker

Check server response of

Server response
NS records
Whois domain
Response headers
Request headers
Raw HTML code
400 Bad Request - cfxk.com
HTTP Status: 400
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Server: squid/5.5
Mime-Version: 1.0
Date: Sun, 20 Apr 2025 01:29:58 GMT
Content-Type: text/html;charset=utf-8
Content-Length: 3479
X-Squid-Error: ERR_INVALID_URL 0
Connection: close

HTTP Code 400 Bad Request

400 status code indicates that the server cannot process the request due to client error.

When is Code 400 used?

  • When the request is malformed or contains invalid parameters
  • When required data is missing in the request
  • When sending an incorrect JSON or XML payload

What does Code 400 mean for the user?

The user receives an error message indicating that their request is incorrect and needs to be fixed.

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

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html><head>
<meta type="copyright" content="Copyright (C) 1996-2022 The Squid Software Foundation and contributors">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>ERROR: The requested URL could not be retrieved</title>
<style type="text/css"><!-- 
 /*
 * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

/*
 Stylesheet for Squid Error pages
 Adapted from design by Free CSS Templates
 http://www.freecsstemplates.org
 Released for free under a Creative Commons Attribution 2.5 License
*/

/* Page basics */
* {
	font-family: verdana, sans-serif;
}

html body {
	margin: 0;
	padding: 0;
	background: #efefef;
	font-size: 12px;
	color: #1e1e1e;
}

/* Page displayed title area */
#titles {
	margin-left: 15px;
	padding: 10px;
	padding-left: 100px;
	background: url('/squid-internal-static/icons/SN.png') no-repeat left;
}

/* initial title */
#titles h1 {
	color: #000000;
}
#titles h2 {
	color: #000000;
}

/* special event: FTP success page titles */
#titles ftpsuccess {
	background-color:#00ff00;
	width:100%;
}

/* Page displayed body content area */
#content {
	padding: 10px;
	background: #ffffff;
}

/* General text */
p {
}

/* error brief description */
#error p {
}

/* some data which may have caused the problem */
#data {
}

/* the error message received from the system or other software */
#sysmsg {
}

pre {
}

/* special event: FTP directory listing */
#dirmsg {
    font-family: courier, monospace;
    color: black;
    font-size: 10pt;
}
#dirlisting {
    margin-left: 2%;
    margin-right: 2%;
}
#dirlisting tr.entry td.icon,td.filename,td.size,td.date {
    border-bottom: groove;
}
#dirlisting td.size {
    width: 50px;
    text-align: right;
    padding-right: 5px;
}

/* horizontal lines */
hr {
	margin: 0;
}

/* page displayed footer area */
#footer {
	font-size: 9px;
	padding-left: 10px;
}


body
:lang(fa) { direction: rtl; font-size: 100%; font-family: Tahoma, Roya, sans-serif; float: right; }
:lang(he) { direction: rtl; }
 --></style>
</head><body id="ERR_INVALID_URL">
<div id="titles">
<h1>ERROR</h1>
<h2>The requested URL could not be retrieved</h2>
</div>
<hr>

<div id="content">
<p>The following error was encountered while trying to retrieve the URL: <a href="/">/</a></p>

<blockquote id="error">
<p><b>Invalid URL</b></p>
</blockquote>

<p>Some aspect of the requested URL is incorrect.</p>

<p>Some possible problems are:</p>
<ul>
<li><p>Missing or incorrect access protocol (should be <q>http://</q> or similar)</p></li>
<li><p>Missing hostname</p></li>
<li><p>Illegal double-escape in the URL-Path</p></li>
<li><p>Illegal character in hostname; underscores are not allowed.</p></li>
</ul>

<p>Your cache administrator is <a href="mailto:root?subject=CacheErrorInfo%20-%20ERR_INVALID_URL&amp;body=CacheHost%3A%20host%0D%0AErrPage%3A%20ERR_INVALID_URL%0D%0AErr%3A%20%5Bnone%5D%0D%0ATimeStamp%3A%20Sun,%2020%20Apr%202025%2001%3A29%3A58%20GMT%0D%0A%0D%0AClientIP%3A%20135.181.60.100%0D%0A%0D%0AHTTP%20Request%3A%0D%0A%0D%0A%0D%0A">root</a>.</p>
<br>
</div>

<hr>
<div id="footer">
<p>Generated Sun, 20 Apr 2025 01:29:58 GMT by host (squid/5.5)</p>
<!-- ERR_INVALID_URL -->
</div>
</body></html>

Whois info of domain

Domain Name: CFXK.COM
Registry Domain ID: 1531447327_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.ename.com
Registrar URL: http://www.ename.net
Updated Date: 2024-11-03T22:21:17Z
Creation Date: 2008-12-04T19:49:37Z
Registry Expiry Date: 2025-12-04T19:49:37Z
Registrar: eName Technology Co., Ltd.
Registrar IANA ID: 1331
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: 86.4000044400
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.ALIDNS.COM
Name Server: NS2.ALIDNS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-13T18:14:35Z <<<
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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