check web redirect url status code checker

Check server response of

Server response
NS records
Whois domain
Response headers
Request headers
Raw HTML code
502 Bad Gateway - czlzc.com
HTTP Status: 502
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Server: nginx
Date: Fri, 02 May 2025 17:53:08 GMT
Content-Type: text/html
Content-Length: 150
Connection: keep-alive

HTTP Code 502 Bad Gateway

502 status code indicates that the server acting as a gateway or proxy received an invalid response from an upstream server.

When is Code 502 used?

  • When a server is down or unreachable
  • When there is a misconfiguration in server settings
  • When a reverse proxy or load balancer fails to connect to the backend server

What does Code 502 mean for the user?

The user cannot access the requested resource due to a temporary issue between servers.

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

<html>
<head><title>502 Bad Gateway</title></head>
<body>
<center><h1>502 Bad Gateway</h1></center>
<hr><center>nginx</center>
</body>
</html>

Whois info of domain

Domain Name: CZLZC.COM
Registry Domain ID: 2930935453_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.wdomain.com
Registrar URL: http://www.wdomain.com
Updated Date: 2024-11-02T23:07:08Z
Creation Date: 2024-11-02T18:08:47Z
Registry Expiry Date: 2025-11-02T18:08:47Z
Registrar: WDomain.Com3 Limited
Registrar IANA ID: 3964
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: 852-59855337
Domain Status: ok https://icann.org/epp#ok
Name Server: NS1.DOMAINNAMEDNS.COM
Name Server: NS2.DOMAINNAMEDNS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-02T17:53:03Z <<<
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
TERMS OF USE: You are not authorized to access or query our Whois
by the following terms of use: You agree that you may use this Data only
to: (1) allow, enable, or otherwise support the transmission of mass