157.55.39.13
IP Intelligence Briefing: 157.55.39.13
Date: 2026-06-16
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**1. Core Profile**
- Risk Score: Low (25/100)
- Ownership: Microsoft Corporation (ASN 8075, MSFT-GFS)
- Geolocation: US (Boston, MA)
- Network Role: Microsoft Azure CloudCompute (Firewalled / No Services)
- Threat Indicators: No malicious activity detected (no known attackers, spam, or Tor exit nodes).
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**2. Observation History**
- Latest Activity: 2026-06-16
- Key Signals:
- Geolocation and ownership confirmed via ARIN.
- DNS records linked to `msnbot-157-55-39-13.search.msn.com` (Microsoft botnet).
- DNSSEC and CAA records valid; no DNSBL listings.
- Trend: Stable with no recent changes in risk or network behavior.
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**3. Relationships**
- DNS Associations:
- `msnbot-157-55-39-13.search.msn.com` (Microsoft Search bot).
- Network:
- Subnet `157.55.39.0/24` (part of Microsoft’s MSFT-GFS network).
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**4. Neighborhood Analysis**
- Subnet: `157.55.39.0/24` (28 IPs total).
- Risk Distribution:
- 1 medium-risk IP, 27 low-risk IPs.
- Notable Neighbors:
- `157.55.39.197` (riskScore 50), `157.55.39.205` (riskScore 25).
- Abuse Density: 0% (no malicious activity in subnet).
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**5. Actionable Insights**
- SOC Prioritization:
- Monitor high-risk neighbors (e.g., `157.55.39.197`) for anomalies.
- Validate DNS records for `msnbot-157-55-39-13.search.msn.com` to ensure no spoofing.
- Mitigation:
- No immediate action required for 157.55.39.13, but maintain visibility of its subnet.
- Correlate with internal logs to confirm legitimate Microsoft traffic.
Conclusion: This IP is part of Microsoft’s legitimate infrastructure. While no threats are detected, monitor its subnet for potential lateral movement or compromised neighbors.
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-157-55-39-13.search.msn.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | msnbot-157-55-39-13.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 | 17% | 1 | 1 |
| routing | 17% | 1 | 1 |
| services | 17% | 1 | 1 |
| ownership | 35% | 2 | 3 |
| reputation | 17% | 1 | 1 |
| geolocation | 35% | 2 | 2 |
| Overall | 23% | 8 | 9 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-06-11 15:07:58 UTC |
| Last Seen | 2026-06-21 18:50:22 UTC |
| Profile Built | 2026-06-21 18:53:18 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 20 |
Full dossier details are available via our API.