Domain > sso-auth.startupschool.org

More information on this domain is in AlienVault OTX

Whois

Property	Value
Name	Nicholas Sivo
Organization	Y Combinator
Email	domains@ycombinator.com
Address	335 Pioneer Way
Zip Code	94041
City	Mountain View
State	CA
Country	US
Phone	+1.6509647561
NameServer	ns-26.awsdns-03.com
Created	2005-03-08 18:44:16
Changed	2015-01-11 00:20:42
Expires	2020-03-08 18:44:16
Registrar	Gandi SAS (R42-LROR)

DNS Resolutions

Date	IP Address
2019-09-15	104.24.12.100 (ClassC)
2025-09-25	172.66.161.100 (ClassC)
2025-10-07	104.20.31.221 (ClassC)

HTTP/1.1 404 Not FoundDate: Thu, 25 Sep 2025 06:48:21 GMTContent-Type: text/html; charsetutf-8Transfer-Encoding: chunkedConnection: keep-alivex-request-id: 992c7470-c34c-4da2-95b0-52f56afaf3cex-runtim

!DOCTYPE html>html langen>head>  title>Y Combinator | File Not Found/title>  meta charsetutf-8>  meta contentIEedge;chrome1 http-equivX-UA-Compatible>  meta contentinitial-scale1, widthdevice-width, heightdevice-height nameviewport>  link href/favicon.ico relshortcut icon typeimage/x-icon>  !--if lt IE 9>script src//html5shim.googlecode.com/svn/trunk/html5.js>/script>!endif-->  style>  * {    margin: 0;    padding: 0;  }  html, body {    height: 100%;    background: #FDFDF8;    color: #de662c;    font-family: Avenir, sans-serif;    display: flex;    flex-direction: column;    align-items: center;    justify-content: center;  }  h1 {    font-size: 80px;    line-height: 80px;  }  a {    color: #268bd2;    font-weight: 500;  }  p {    position: absolute;    bottom: 20px;    background: inherit;  }  /style>/head>body classnojs>  h1>404/h1>  h2>File Not Found/h2>  a href/ idtry>Back to the homepage/a>  p>For support please contact a href/cdn-cgi/l/email-protection#8ffce0e9fbf8eefdeacff6ece0e2ede6e1eefbe0fda1ece0e2>span class__cf_email__ data-cfemaild5a6bab3a1a2b4a7b095acb6bab8b7bcbbb4a1baa7fbb6bab8>email protected/span>/a>/p>script data-cfasyncfalse src/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js>/script>/body>/html>

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Domain > sso-auth.startupschool.org

Is this malicious?

Whois

DNS Resolutions

Port 80

Port 443