52.123.251.43
Analysis of IP 52.123.251.43/32 identified the address as Microsoft Corporation infrastructure (ASN 8075) within the 52.120.0.0/14 block. The node operated as a CloudCompute host and Web Server, listening on TCP ports 80, 443, and 8443. TLS certificate validation confirmed ownership of the outlook.com domain and associated Microsoft entities.
Threat assessment classified the IP as Low Risk with a reputation score of 20. Zero blacklists, known campaigns, or attacker indicators were associated with the address. Neighborhood analysis categorized the 52.123.251.0/24 subnet as mostly clean with an abuse density of 0.1091.
Observations indicated a contradiction between claimed Redmond, Washington geolocation and RTT physics measurements suggesting a 6380km distance. Behavioral analysis recorded no honeypot hits, enumeration strikes, or WAF violations. The intelligence recommendation was to monitor the asset with low severity. Observations remained live from September 4 to September 11, 2026.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | MSFT |
| CIDR Block | 52.120.0.0/14 |
| RIR | ARIN |
| 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 Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 10/14 domains |
| DMARC | 12/14 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 14 domains |
☁️ 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 | — |
| 8443 | https-alt | tcp | — |
| Closed Ports | 22, 25, 3389, 8080 (3 open / 7 scanned) | ||
| Server | Microsoft-HTTPAPI/2.0 |
| HTTP Title | — |
🔐 TLS Certificate
| 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 | 2026-06-26T00:00:00+00:00 |
| Valid Until | 2027-01-10T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha256RSA |
| Validity Period | 198 days |
| Serial Number | 0E371D2766FD365DADDCF4004297839E |
| Thumbprint | C7C19E04464D744D810EF31A24C54FC22A7909C5 |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 38% | 2 | 5 |
| routing | 13% | 1 | 1 |
| services | 27% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 22% | 1 | 3 |
| geolocation | 33% | 2 | 5 |
| Overall | 27% | 10 | 21 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-04 04:59:12 UTC |
| Last Seen | 2026-09-27 17:38:13 UTC |
| Profile Built | 2026-09-27 17:43:23 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 54 |
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