157.55.39.9
IP Intelligence Briefing: 157.55.39.9
Date: 2026-06-12
---
**1. Profile Summary**
- Risk Score: Moderate (50/100)
- Ownership: Microsoft Corporation (ASN 8075, MSFT-GFS subnet)
- Geolocation: Madison, WI, US (validated via DNS and geolocation signals)
- Network Role: Microsoft Azure CloudCompute infrastructure (firewalled, no services exposed)
- Threat Indicators: No malicious indicators, no DNS/IP blacklists, no known attacker associations.
---
**2. Observation History**
- Recent Activity (2026-06-12):
- Geolocation Validation: ICMP blocked, unable to validate exact location (7883 km from probe).
- DNS Records: Resolved to `msnbot-157-55-39-9.search.msn.com` (Microsoft botnet host).
- Routing Stability: BGP prefix `157.55.0.0/16` shows route instability (0.3478 operator score).
- Subnet Abuse Density: 35% abuse density in `157.55.39.9/24` subnet.
---
**3. Relationships & Context**
- Linked Entities:
- Microsoft Azure Network: Part of `MSFT-GFS` subnet (Microsoft's global infrastructure).
- DNS Associations: Linked to `msn.com` domain (Microsoft's search botnet infrastructure).
- Subnet Neighbors: 20 sibling IPs in `157.55.39.9/24` (6 active, 7 with elevated risk scores).
---
**4. Neighborhood Analysis**
- Subnet Risk: Mixed (abuse density 35%).
- High-Risk Neighbors:
- 157.55.39.197 (riskScore: 50), 157.55.39.205 (riskScore: 25), 157.55.39.195 (riskScore: 25).
- Low-Risk Neighbors: Most IPs in subnet have riskScore: 0 or 25.
---
**5. Actionable Insights**
- Monitor Subnet: Elevated abuse density in the subnet warrants closer scrutiny of neighboring IPs.
- Verify Geolocation: ICMP blocking may indicate network segmentation; validate with alternative methods.
- DNS Security: Ensure DNSSEC and CAA records are properly configured for `msn.com` domain.
- Cloud Security: Confirm Azure infrastructure protections are active to prevent unauthorized access.
Conclusion: 157.55.39.9 is a legitimate Microsoft Azure IP with no direct threat indicators. However, its subnet's mixed risk profile and partial geolocation validation suggest monitoring for potential lateral movement or network anomalies.
---
*Generated by IPDebrief intelligence platform.*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | MSFT-GFS |
| CIDR Block | 157.54.0.0/15 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | msnbot-157-55-39-9.search.msn.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | msnbot-157-55-39-9.search.msn.com |
🔐 DNS Hygiene
| Hygiene Score | 100% (Excellent) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Present |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 33% | 2 | 2 |
| routing | 13% | 1 | 1 |
| services | 13% | 1 | 1 |
| ownership | 27% | 2 | 3 |
| reputation | 23% | 1 | 2 |
| geolocation | 33% | 2 | 3 |
| Overall | 24% | 9 | 12 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Fresh
| First Seen | 2026-05-31 11:13:52 UTC |
| Last Seen | 2026-06-21 06:20:41 UTC |
| Profile Built | 2026-06-21 15:36:28 UTC |
| Data Freshness | Fresh |
| Signal Types | 21 |
| Total Observations | 24 |
Full dossier details are available via our API.