40.100.4.165
40.100.4.165 is an IPv4 address operated by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US (AS8075), with approximate network location Vienna, Austria. It belongs to datacenter or hosting infrastructure. As of November 13, 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 |
| Routing operator | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US |
| 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.
| caa | Not applicable |
| spf | Unknown / lookup inconclusive attachment.outlook.live.net, attachment.outlook.office.net, hotmail.com, internal.outlook.com, live.com, office.com, office365.com, outlook.com, outlook.office365.com |
| dmarc | Unknown / lookup inconclusive _dmarc.attachment.outlook.live.net, _dmarc.attachment.outlook.office.net, _dmarc.hotmail.com, _dmarc.internal.outlook.com, _dmarc.live.com, _dmarc.office.com, _dmarc.office365.com, _dmarc.outlook.com, _dmarc.outlook.office365.com |
| dnssec | Unknown / lookup inconclusive 165.4.100.40.in-addr.arpa |
| fcrDns | Unknown / lookup inconclusive |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| Port | Probe target | Certificate finding |
|---|---|---|
| (IP-targeted) | CN=outlook.com, O=Microsoft Corporation, L=Redmond, S=Washington, C=US Historical certificate; current certificate unknown |
| SANs | outlook.com*.hotmail.com*.internal.outlook.com*.live.com*.office.com*.office365.com*.outlook.com*.outlook.office365.comattachment.outlook.live.netattachment.outlook.office.net |
| Valid From | 2026-10-13T00:00:00+00:00 |
| Valid Until | 2027-04-29T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha256RSA |
| Validity Period | 198 days |
🛡️ Public Network Snapshot
| Origin ASN | AS8075 |
| Network Prefix | 40.96.0.0/13 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Enabled |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 23% | 1 | 1 |
| routing | 23% | 1 | 1 |
| services | 47% | 2 | 3 |
| ownership | 47% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 33% | 2 | 2 |
| Overall | 29% | 8 | 10 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-23 09:36:29 UTC |
| Last Seen | 2026-11-08 02:45:21 UTC |
| Profile Built | 2026-11-13 07:24:14 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 22 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 40.100.4.165
Who owns the IP address 40.100.4.165?
40.100.4.165 is registered to Microsoft Corporation. The address falls within the 40.74.0.0/15 network block. Registration is held at ARIN.
Where is 40.100.4.165 located?
Geolocation data places 40.100.4.165 in Vienna, State of Vienna, Austria. The local time zone is Europe/Vienna. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 40.100.4.165 malicious or safe?
40.100.4.165 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 40.100.4.165?
Responsive ports observed on 40.100.4.165 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 40.100.4.165 a VPN, proxy, or data center address?
40.100.4.165 is classified as cloud infrastructure and hosting infrastructure based on network ownership and behavioural analysis.