52.159.245.161📋 Copy

# IP Intelligence Briefing: 52.159.245.161/32

Classification: Microsoft Azure Cloud Infrastructure | Risk Level: Moderate (Score: 50) | Date: 2026-06-16

## Executive Summary

IP address 52.159.245.161 is Microsoft Corporation infrastructure (ASN 8075, MSFT) operating within the Azure cloud compute environment. The IP demonstrates a moderate risk profile primarily attributable to DNSBL listings, with no active threat indicators, malware signatures, or known campaign associations. Infrastructure is fully firewalled with no observable services.

## Ownership and Infrastructure

• Organization: Microsoft Corporation
• ASN: 8075
• Network Block: 52.145.0.0/16
• RIR: ARIN
• Infrastructure Type: CloudCompute (Microsoft Azure)
• Geolocation: United States (California, WA) — Consensus confirmed across multiple sources

## Threat Assessment

Current Risk Indicators:

• No known attacker reputation
• No Tor exit node activity
• No spam source classification
• Zero blacklist matches at time of observation
• No active threat indicators or campaign associations

DNSBL Status: Listed on 2 of 8 DNSBL feeds, indicating potential reputation friction but not active abuse.

Service Exposure: No open ports detected. Infrastructure classified as firewalled with no services accessible.

## Neighborhood Analysis

Subnet 52.159.245.0/24 analysis reveals:

• Abuse Density: 0 (clean subnet)
• Neighbor Count: 3 additional IPs in /24
• Risk Distribution: 0 high-risk, 0 medium-risk, 3 low-risk neighbors

Sibling IP risk scores:

• 52.159.245.153: Risk 0 (Low)
• 52.159.245.160: Risk 25 (Low)
• 52.159.245.162: Risk 0 (Low)

No inherited risk from neighboring addresses.

## Historical Observations

Thirteen observations recorded as of 2026-06-16. Analysis indicates:

• Consistent Microsoft Corporation ownership confirmed
• No ownership changes observed
• No persistent threat activity detected
• Operator score classified as "Minimal" (0.1304)
• No threat persistence indicators

Temporal analysis confirms the IP is not persistently malicious with zero threat observation count.

## Relationship Graph

Four relationships identified, all classified as "Same Network" pointing to MSFT. No external hostnames, certificates, or organizational entities linked beyond Microsoft infrastructure.

## Recommended Actions

Based on the moderate risk classification and DNSBL listings:

• Default Block: Not recommended. Legitimate Microsoft Azure infrastructure.
• Allow with Monitoring: Permissive policy appropriate. No firewall rules required beyond standard cloud egress controls.
• Threat Hunting: No active indicators warrant proactive blocking.

## Intelligence Narrative

The IP 52.159.245.161 represents legitimate Microsoft Azure cloud infrastructure with no evidence of malicious activity. The moderate risk score of 50 reflects DNSBL presence rather than active threats. The IP operates within a clean subnet (abuse density 0) and maintains consistent ownership attribution to Microsoft Corporation. No security actions beyond standard operational procedures are warranted. SOC analysts may safely allow traffic from this address with routine monitoring.

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