5.39.57.91📋 Copy

# IP Intelligence Briefing: 5.39.57.91

Classification: Cloud Infrastructure IP with Contradictory Risk Signals

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## Executive Summary

IP address 5.39.57.91 is registered to OVH cloud infrastructure with a low-risk reputation score (0). However, historical signal analysis reveals conflicting threat indicators, including three blacklist listings with high severity ratings. The IP shows no active services, open ports, or network services, operating in a firewalled state.

Recommended Action: Monitor for outbound connection attempts; no immediate blocking required.

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## Network Profile

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## Threat Indicators

• Abuse Confidence: Data indicates potential abuse signals
• Blacklist Count: 3 out of 8 total listings detected
• Maximum Severity: High
• Known Campaigns: None identified
• Campaign Likelihood: Not established

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## Network Behavior

• Open Ports: None detected
• Active Services: None
• TLS/HTTP Activity: No services exposed
• Email Reputation: Not applicable (no email authentication records)
• DNS Records: No PTR hostnames; reverse DNS present (91.57.39.5.in-addr.arpa)
• DNSSEC: Validated on reverse DNS record

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## Historical Analysis

Observation history (10 total signals) shows the following trends:

• Recent Activity: Multiple signals observed on 2026-07-30
• Threat Persistence: 0 days (no persistent malicious activity detected)
• Ownership Changes: 0 recorded
• Signal Confidence: Variable (0.12 to 0.90)

Key historical signals:

• DNS resolution for ip-5-39-57.eu (confidence: 0.50)
• Reverse DNS validation with DNSSEC (confidence: 0.90)
• Threat listing activity with high severity (confidence: 0.85)

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## Neighborhood Analysis

Finding: No neighboring IPs detected in the /24 subnet with abuse indicators.

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## Relationship Graph

No related entities identified in the relationship graph. No connections to associated organizations, hostnames, certificates, or subnets.

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## Recommended Security Actions

Based on current risk profile and historical indicators:

1. Monitor for outbound connection attempts to this IP

2. Log all traffic to/from this address for forensic analysis

3. Block only if specific malicious activity is confirmed

4. No immediate firewall rules recommended due to low current risk score

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## Intelligence Notes

The IP presents a data incongruity: low-risk profile classification versus high-severity blacklist listings. This discrepancy may indicate:

• Legitimate OVH cloud infrastructure with historical abuse
• False positive blacklist entries
• IP recycling or ownership changes

Data Confidence: Limited due to sparse profile data and cloud infrastructure classification. Further investigation recommended if this IP appears in threat feeds.

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*Report generated: IPDebrief Intelligence Platform*

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