54.39.210.100📋 Copy

# IP Intelligence Briefing: 54.39.210.100

Classification: MODERATE RISK

Date of Analysis: Current

Analyst: IPDebrief Intelligence Team

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## EXECUTIVE SUMMARY

IP 54.39.210.100 is a cloud infrastructure endpoint hosted on OVH infrastructure in Quebec, Canada, associated with the ahrefs.net domain. The IP exhibits moderate risk characteristics with significant neighborhood abuse density and historical threat observations. While the IP itself shows no active threat indicators, it resides within a high-abuse subnet requiring monitoring.

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## INFRASTRUCTURE PROFILE

Ownership & Registration

• Organization: Dmytro, Ahrefs Pte Ltd
• Netname: OVH-CUST-281059686
• ASN: 16276 (OVH SAS)
• CIDR Block: 54.39.210.0/24
• RIR Registry: ARIN

Geolocation

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Coordinates: 45.3161°N, -73.8736°W
• Geolocation Confidence: PLAUSIBLE VIOLATION DETECTED
• RTT Anomaly: Measured 31ms RTT inconsistent with 5,629km distance (minimum expected 112.6ms)

Network Role

• Infrastructure Type: Cloud Compute
• Provider: OVH
• Classification: Hosting / Cloud Infrastructure
• Service Status: Firewalled / No Services Detected
• DNS PTR: proxy-ca007-san100.ahrefs.net

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## RISK ASSESSMENT

Overall Risk Score: 40/100

Threat Indicators

• Blacklist Count: 0
• DNSBL Listings: 1/8 lists
• Known Campaigns: None
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No

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## NEIGHBORHOOD ANALYSIS

Subnet: 54.39.210.100/24

• Total Siblings: 256 IPs
• Active Siblings: 206 IPs
• Threat Siblings: 205 IPs
• Abuse Density: 80.08% (HIGH ABUSE CLASSIFICATION)
• Inherited Risk: 32/100

Risk Distribution in /24:

• High Risk: 0
• Medium Risk: 100
• Low Risk: 0

Finding: This subnet demonstrates pervasive medium-risk activity across 100+ neighbor IPs, all showing uniform risk scoring patterns. The high threat sibling count (205/256) indicates coordinated or shared infrastructure usage with elevated abuse potential.

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## OBSERVATION HISTORY

Total Observations: 24 signals

Recent Activity Timeline:

• 2026-06-28 23:02: Threat indicators detected (AlienVault OTX)
• 2026-06-20 20:57: Geolocation signals with low confidence
• 2026-06-20 20:56: Abuse density classification (high_abuse)
• 2026-06-20 20:56: Port scan activity recorded

Temporal Indicators

• Threat Persistence: 0 days
• Ownership Changes: 0
• Is Persistently Malicious: No
• Threat Observation Count: 1

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## RELATIONSHIP GRAPH

Total Relationships: 56 entities

Primary Associations:

• Network: OVH-CUST-281059686 (multiple relationships)
• Infrastructure Type: Same Network clusters

Analysis: The IP maintains extensive relationships within the OVH hosting infrastructure, indicating it is part of a larger cloud environment. No certificate-based or organizational relationships detected beyond network-level associations.

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## SECURITY ACTIONS & RECOMMENDATIONS

Recommended Actions:

1. Monitor: Implement traffic monitoring for this IP due to moderate risk score and high-abuse neighborhood context

2. Geo-Validation: Investigate geolocation inconsistency (31ms RTT vs. 5,629km distance) - may indicate proxy usage or spoofing

3. DNSBL Review: Examine 1 DNSBL listing out of 8 total lists for context

4. Subnet Awareness: Apply subnet-level controls given 80% abuse density in /24

Firewall Considerations:

• No open ports detected - firewall rules may be unnecessary for this specific IP
• Monitor for service emergence
• Consider blocking at perimeter if traffic patterns align with threat indicators

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## INTELLIGENCE CONCLUSIONS

IP 54.39.210.100 represents a MODERATE RISK cloud infrastructure endpoint within a HIGH ABUSE DENSITY subnet. While the IP itself shows no active malicious indicators and is associated with legitimate hosting infrastructure (ahrefs.net), the neighborhood context suggests elevated threat potential.

Key Concerns:

• Geolocation data integrity compromised (RTT anomaly)
• 80% abuse density in /24 subnet
• 205 threat siblings in same network
• Recent threat indicator detection

Recommended SOC Actions:

• Monitor for service emergence and traffic pattern changes
• Investigate geolocation anomaly
• Apply subnet-level observability controls
• Correlate with other ahrefs.net infrastructure

Priority: LOW-MEDIUM (Monitor rather than block)

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