check web redirect url status code checker

Check server response of

Server response
NS records
Whois domain
Response headers
Request headers
Raw HTML code
401 Unauthorized - utf4.com
HTTP Status: 401
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Resource-Policy: same-origin
Origin-Agent-Cluster: ?1
Referrer-Policy: no-referrer
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Content-Type-Options: nosniff
X-DNS-Prefetch-Control: off
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-XSS-Protection: 0
Access-Control-Allow-Origin: null
Vary: Origin, Accept-Encoding
WWW-Authenticate: Basic realm="SillyTavern", charset="UTF-8"
Content-Type: text/html; charset=utf-8
Content-Length: 341
ETag: W/"155-T7EagjrTM34NbkJuNmLNC5gK8rI"
X-Response-Time: 0.387ms
Date: Tue, 13 May 2025 07:18:24 GMT
Connection: keep-alive
Keep-Alive: timeout=5

HTTP Code 401 Unauthorized

http status code 401 means that access to the requested resource requires authentication.

When is Code 401 used?

  • When accessing a restricted page without login credentials
  • When an API request lacks valid authentication tokens

What does Code 401 mean for the user?

The user must log in or provide valid credentials to access the resource.

GET / HTTP/1.1
Host: utf4.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<!DOCTYPE html>
<html>

<head>
    <title>Unauthorized</title>
</head>

<body>
    <h1>Unauthorized</h1>
    <p>
        If you are the system administrator, you can configure the
        <code>basicAuthUser</code> credentials by editing
        <code>config.yaml</code> in the root directory of your installation.
    </p>
</body>

</html>

Whois info of domain

Domain Name: UTF4.COM
Registry Domain ID: 2673457808_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2022-05-25T15:21:51Z
Creation Date: 2022-02-07T09:26:55Z
Registry Expiry Date: 2027-02-07T09:26:55Z
Registrar: NameCheap, Inc.
Registrar IANA ID: 1068
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +1.6613102107
Domain Status: ok https://icann.org/epp#ok
Name Server: DNS1.REGISTRAR-SERVERS.COM
Name Server: DNS2.REGISTRAR-SERVERS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-13T07:18:09Z <<<
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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