check web redirect url status code checker

Check server response of

Server response
NS records
Whois domain
Response headers
Request headers
Raw HTML code
503 Service Unavailable - 81cto.com
HTTP Status: 503
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Server: openresty
Date: Sat, 03 May 2025 00:37:18 GMT
Content-Type: text/html;charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Retry-After: 600
Set-Cookie: 135.181.60.100=35238697916991; Path=/

HTTP Code 503 Service Unavailable

503 http status code indicates that the server is temporarily unavailable due to overload or maintenance.

When is Code 503 used?

  • When a server is overloaded with traffic
  • When the server is undergoing scheduled maintenance
  • When a web application temporarily restricts access

What does Code 503 mean for the user?

The user must wait and try again later, as the server is currently unavailable.

GET / HTTP/1.1
Host: 81cto.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<script>setTimeout(function() { location.reload(); }, 100);</script>

Whois info of domain

Domain Name: 81CTO.COM
Registry Domain ID: 2902364039_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.web.com
Registrar URL: http://www.networksolutions.com
Updated Date: 2024-07-26T02:16:19Z
Creation Date: 2024-07-25T18:11:44Z
Registry Expiry Date: 2025-07-25T18:11:44Z
Registrar: Names On The Drop LLC
Registrar IANA ID: 2869
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +1.8003337680
Domain Status: ok https://icann.org/epp#ok
Name Server: A.SHARE-DNS.COM
Name Server: B.SHARE-DNS.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-03T00:37:14Z <<<
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