54.39.6.171📋 Copy

# INTELLIGENCE BRIEFING: IP 54.39.6.171/32

Classification: Moderate Risk | Date: Current | Source: IPDebrief Intelligence Platform

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## EXECUTIVE SUMMARY

IP address 54.39.6.171 is a cloud compute infrastructure endpoint hosted within OVH's Canadian network, associated with Ahrefs Pte Ltd. The IP demonstrates moderate risk characteristics with a risk score of 40/100, primarily driven by its high-abuse-density subnet environment. No active threat indicators or known malicious campaigns were detected. The endpoint resolves to legitimate Ahrefs domain infrastructure.

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## INFRASTRUCTURE PROFILE

Ownership & Registration:

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Name: OVH-CUST-281059680
• Registration: ARIN registry
• CIDR Block: 54.39.6.0/24

Geolocation:

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Accuracy Radius: 3,000 km

Network Classification:

• Type: Cloud Compute / Hosting Infrastructure
• Firewall Status: Active (No services detected)
• CDN/Proxy/Tor: Not identified as CDN, VPN, proxy, or Tor exit node

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## DNS & HOSTNAME ANALYSIS

Reverse DNS (PTR): proxy-ca001-san171.ahrefs.net

Forward Resolution: Confirmed to ahrefs.net

Hosted Domain: ahrefs.net (SEO analytics platform)

Email Authentication: SPF and DMARC records not detected

The forward resolution confirms the IP serves Ahrefs infrastructure, consistent with the organizational attribution.

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## THREAT INTELLIGENCE

Current Risk Assessment:

• Risk Score: 40 (Moderate Risk)
• Abuse Confidence: Not elevated
• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Blacklist Count: 0

DNSBL Status:

• Listed on 1 of 8 threat feeds

Threat Indicators: None detected. No indicators of compromise, malicious activity, or known campaign associations were observed.

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## TEMPORAL ANALYSIS & HISTORY

Observation Count: 22 signals tracked

Latest Signals: 2026-06-20 and 2026-06-15

Threat Persistence: 0 days (not persistently malicious)

Ownership Changes: 0 (stable infrastructure)

Signal History Trends:

• Operator score consistently rated "Minimal" (0.2174)
• Subnet-level abuse density maintained at 0.6055
• No escalation in threat indicators over observation period

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## SUBNET NEIGHBORHOOD ANALYSIS

Subnet: 54.39.6.0/24

• Total Siblings: 256
• Active Siblings: 170
• Threat Siblings: 155
• Inherited Risk Score: 24
• Abuse Density: 0.6055 (High Abuse Classification)

Neighbor Risk Distribution: 100 medium-risk neighbors, 0 high-risk neighbors identified in sampled set.

The subnet exhibits elevated abuse density typical of cloud hosting environments. While the target IP itself shows no malicious activity, the neighborhood risk profile suggests shared infrastructure with potentially compromised endpoints.

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## RECOMMENDED ACTIONS

Firewall/Network Rules:

• No immediate blocking required; IP operates within legitimate cloud hosting infrastructure
• Monitor for anomalous outbound traffic patterns given subnet's high abuse density
• Consider rate-limiting inbound connections if application requires

SOC Monitoring:

• Alert on any DNS resolution changes to non-ahrefs.net domains
• Monitor for unexpected service port openings
• Track subnet-level abuse trends for correlation events

Investigation Priority: Medium (Infrastructure-level monitoring recommended due to neighborhood risk profile)

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Analyst Notes: This endpoint represents legitimate Ahrefs analytics infrastructure. The moderate risk score is primarily driven by the high-abuse-density cloud hosting subnet rather than IP-specific malicious activity. Continuous monitoring of the subnet neighborhood is recommended due to 155+ threat siblings within the /24 block.

Report Generated: IPDebrief Intelligence Platform | Data Source: Real-time IP intelligence feeds

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