40.99.10.66 is an IPv4 address announced by AS8075, with approximate network location Singapore, Singapore. As of November 9, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | MSFT |
| CIDR Block | 40.74.0.0/15 |
| RIR | ARIN |
| Network registration country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
DNS Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP.
DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| spf | Not checked |
| dmarc | Not checked |
| fcrDns | Not checked |
| dnssec | Not checked |
| caa | Not checked |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
No specific classification
🔍 12 signal types · 12 observations collected
This report is generated from 12+ independent intelligence signals including
ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds,
behavioral fingerprinting, and more.
Full dossier details are available via our API.
❓ Frequently Asked Questions About 40.99.10.66
Who owns the IP address 40.99.10.66?
40.99.10.66 is registered to Microsoft Corporation. The address falls within the 40.74.0.0/15 network block. Registration is held at ARIN.
Where is 40.99.10.66 located?
Geolocation data places 40.99.10.66 in Singapore. The local time zone is Asia/Singapore. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 40.99.10.66 malicious or safe?
40.99.10.66 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What ports are open on 40.99.10.66?
Responsive ports observed on 40.99.10.66 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
