Host

65.52.4.138

Tags: Cloud Hosting Expired certificate

As of our latest check on 2026-07-17, 65.52.4.138 (Microsoft Corporation, AS8075, United States) had 1 open port (443) and no known CVEs.

Known CVEs on this host

1open port
10names pointing here
0known CVEs
0known exploited

Open ports and CVEs as of our latest check of this host, 2026-07-17.

No known CVEs on this host.

Network
Microsoft Corporation AS8075
Open ports
443 · at our latest check, 2026-07-17
Location
United States US
Route
65.52.0.0/14 · announced by Microsoft Corporation AS8075 RPKI valid
Organisation
Microsoft Corporation · Content / hosting
Cloud
Microsoft Azure · AzureCloud · region northcentralus
Registry network
MICROSOFT-1BLK · 65.52.0.0 - 65.55.255.255 · Microsoft Corporation · ARIN
Abuse contact
[email protected] · for MICROSOFT-1BLK
First seen
2026-07-17 18:08 UTC
Last seen alive
2026-07-17 18:12 UTC
Hosted domains
10 names point here

Reputation

Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.

Services (1)

443/tcp TLS first 2026-07-17 · last 2026-07-17
TLS
TLSv1.2
Certificate for
*.medicine.yale.edu, medicine.yale.edu
Issued by
GlobalSign RSA OV SSL CA 2018
Valid
2025-09-11 → 2026-10-13
Raw response
HTTP/1.1 400 Bad Request
Server: nginx
Date: Fri, 17 Jul 2026 18:09:25 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 650
Connection: close
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-ID: 3fab5617f6eaa0114c6972cf1b4c5193
X-Proxy: ysm-nginx-prod2
X-ProxyKey: http65.52.4.138/
X-ProxyKeyAccept: http65.52.4.138/*/*
X-NoCache: 0 (1=bypass/0=cache delivery)
X-RemoteAddr: 23.94.245.4
X-Origin-Forwarded-For: 23.94.245.4
X-UpstreamHost: Upstream Servers not hit

<html>
<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<center>The plain HTTP request was sent to HTTPS port</center>
<hr><center>nginx</center>
</body>
</html>
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Port history

Every port that has answered a connection on this address, and when. A port is listed as open above only when a service was identified on it. Times are UTC.

Hostnames pointing to this address

10 names · as answered by each domain's own name servers

greenwichivf.comfirst seen 2026-10-13
*.greenwichivf.comfirst seen 2026-10-13
researchforher.comfirst seen 2026-10-16
yale20.comfirst seen 2026-10-23
yalemedicalgroup.comfirst seen 2026-10-23
yaletests.comfirst seen 2026-10-23
yaletrials.comfirst seen 2026-10-23
yccistudies.comfirst seen 2026-10-23
yccitests.comfirst seen 2026-10-23
yccitrials.comfirst seen 2026-10-23