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 - y1os.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: 265

HTTP Code 403 Forbidden

403 status code 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: y1os.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<p>
<b>尊敬的用户您好：</b> <br />
您访问的网站被机房安全管理系统拦截，有可能是以下原因造成：<br />
1.您的网站未备案，或者原备案号被取消.<br />
2.域名在访问黑名单中.<br />
3.网站存在非法内容.228

Whois info of domain

Domain Name: Y1OS.COM
Registry Domain ID: 2952745142_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.dnspod.cn
Registrar URL: http://www.dnspod.cn
Updated Date: 2025-01-22T11:55:23Z
Creation Date: 2025-01-22T11:54:13Z
Registry Expiry Date: 2026-01-22T11:54:13Z
Registrar: DNSPod, Inc.
Registrar IANA ID: 1697
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +86.4009100100
Domain Status: ok https://icann.org/epp#ok
Name Server: FIVE.DNSPOD.NET
Name Server: HAKE.DNSPOD.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-09T13:03:02Z <<<
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