4.184.121.217📋 Copy

# IP Intelligence Briefing: 4.184.121.217/32

Classification: Microsoft Azure Cloud Infrastructure

Risk Assessment: Moderate Risk (Score: 65)

Report Date: 2026-07-29

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## Executive Summary

The IP address 4.184.121.217/32 is assigned to Microsoft Corporation (ASN 8075) within the 4.176.0.0/12 CIDR block. The address operates within Microsoft Azure cloud infrastructure in Frankfurt am Main, Germany. While the IP demonstrates cloud-native characteristics typical of Microsoft's infrastructure, the moderate risk score (65) and presence on three DNSBLs warrant defensive monitoring. The IP showed no active threat indicators during observation.

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## Technical Profile

Ownership & Registration:

• Organization: Microsoft Corporation
• ASN: 8075 (MSFT)
• RIR: ARIN
• CIDR Block: 4.176.0.0/12
• Abuse Contact: Available via RDAP

Geolocation:

• Country: Germany (DE)
• Region: Hesse
• City: Frankfurt am Main
• Accuracy Radius: 2500 km
• Geolocation Consensus: True

Network Classification:

• Infrastructure Type: CloudCompute
• Cloud Provider: Microsoft Azure
• Connection Type: Firewalled / No Services
• DNSBL Listed: 3 of 8 total lists

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## Threat Intelligence Analysis

Threat Indicators:

• No active threat indicators detected
• Is Tor Exit: False
• Is Known Attacker: False
• Is Spam Source: False
• Blacklist Count: 0 (direct blacklists)
• Known Campaigns: None

Observed Behaviors:

• No open ports detected
• No TLS certificates present
• No HTTP services running
• No email authentication records (SPF/DMARC)

Control Plane:

• Route Stability: Not stable (route changes detected in 30-day period)
• RPKI State: Not evaluated
• Operator Score: 0.1304 (Minimal)
• BGP Prefix: 4.176.0.0/12

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## Neighborhood Analysis

Subnet Assessment (4.184.121.217/24):

• Abuse Density: 0
• Classification: Clean
• Active Siblings: 0
• Threat Siblings: 0
• Total Siblings: 1

No neighboring threat activity detected within the /24 subnet. The clean classification supports the conclusion that this IP operates within Microsoft's legitimate cloud infrastructure.

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## Observation History

Data Points: 14 observations recorded

Key Temporal Findings:

• Subnet classification maintained as "clean" with 0 abuse density across observations
• Geolocation inconsistencies noted (some probes returned US coordinates vs. DE consensus)
• No ownership changes detected
• No persistent malicious behavior flagged
• Threat observation count: 0

The observation history indicates stable infrastructure behavior with no escalation in risk profile over the measurement period.

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## Relationship Graph

Detected Relationships: 4

• All relationships classified as "Same Network" with target "MSFT"
• No external entity associations detected
• No hostname, certificate, or organization links beyond Microsoft

The relationship graph confirms consistent Microsoft network association without external compromises or C2 infrastructure.

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## Recommended Actions

For SOC Analysts:

1. Monitor for anomalous traffic patterns despite cloud infrastructure classification

2. Verify DNSBL listings to understand listing rationale

3. Consider whitelisting if traffic originates from legitimate Microsoft Azure services

4. No immediate blocking recommended due to legitimate cloud provider ownership

For Firewall Rule Configuration:

• No immediate block/allow rules recommended
• Monitor for deviations from expected Microsoft Azure traffic patterns
• Correlate with known Microsoft service IP ranges

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## Conclusion

IP 4.184.121.217/32 represents legitimate Microsoft Azure cloud infrastructure operating from Frankfurt, Germany. The moderate risk score reflects cloud infrastructure characteristics rather than malicious activity. The IP demonstrated clean classification within its subnet, no active threats, and stable operational behavior throughout observation periods. Defensive monitoring is appropriate, but no blocking or escalation actions are warranted at this time.

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