4.151.158.43📋 Copy

# IP Intelligence Briefing: 4.151.158.43/32

Classification: Microsoft Azure Cloud Infrastructure

Risk Level: Low (Score: 25/100)

Analysis Date: Based on latest available signal data

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## Executive Summary

Target IP 4.151.158.43 is a Microsoft Azure cloud compute resource with no active services or open ports. Historical observation data indicates stable infrastructure behavior consistent with legitimate cloud hosting operations. No active malicious indicators detected.

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## Infrastructure Profile

• Organization: Microsoft Corporation (ASN: 8075)
• Network: 4.144.0.0/12 (Microsoft Azure)
• Location: San Antonio, Texas, US
• Infrastructure Type: CloudCompute / Hosting
• Service Status: Firewalled / No Services Detected
• BGP Stability: Route stable with zero changes in 30-day window
• DNSSEC: Valid

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## Threat Assessment

• Risk Score: 25 (Low)
• Threat Indicators: None detected
• Known Campaigns: None
• Blacklist Status: 0/8 threat lists
• DNSBL Listings: 1 of 8 (investigative note required)
• Tor Exit/Proxy/VPN: Negative across all checks
• Not a known spam source or attacker

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## Historical Observations

• Total Signals: 19 observations
• Observation Period: Recent signals dated 2026-06-15
• Signal Types:

- Port scans (no open ports discovered)

- TLS/HTTP service probing (no services)

- BGP/routing validation (Basic classification)

- Geolocation attribution to AS8075 Microsoft

• Risk Trend: Stable with no escalation patterns

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## Network Relationships & Neighborhood

• Relationship Count: 13 linked entities (all Same Network: MSFT)
• Subnet Analysis: 4.151.158.43/24

- Abuse Density: 1 (Low)

- Classification: mostly_clean

- Threat Siblings: 1

- Inherited Risk: 2

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## Recommended Actions

1. Allow Traffic: Low-risk infrastructure IP with no malicious indicators

2. Monitor: Track the single DNSBL listing for potential false positive resolution

3. Baseline: No firewall rules required; standard Microsoft Azure egress permitted

4. Context: Legitimate cloud compute resource; treat as benign cloud infrastructure

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## Intelligence Notes

• This IP is part of Microsoft's managed cloud infrastructure with no evidence of abuse
• The single DNSBL listing appears to be a false positive given the Microsoft ownership and clean threat profile
• No correlation with known threat campaigns or malicious infrastructure
• Suitable for standard cloud-to-cloud traffic patterns

Status: NO ACTION REQUIRED — BENIGN CLOUD INFRASTRUCTURE

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.