51.222.168.117📋 Copy

## IP INTELLIGENCE BRIEFING: 51.222.168.117/32

Date: June 2026

Classification: Moderate Risk / High-Abuse Subnet

Analyst: IPDebrief Intelligence Team

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EXECUTIVE SUMMARY

IP 51.222.168.117 is a cloud infrastructure endpoint operated by OVH (ASN 16276) within a high-abuse density subnet. The IP presents a moderate risk profile (score: 40) with significant contextual indicators pointing to potential abuse activity. The endpoint is associated with the Ahrefs.net domain but shows no active services, suggesting it may be a dormant or firewalled resource.

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OWNERSHIP & NETWORK CLASSIFICATION

• Provider: OVH SAS (ASN 16276)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 51.222.168.0/24
• Infrastructure Type: CloudCompute / Hosting Provider
• Geolocation: Canada (QC region, coordinates 56.13°N, -106.35°W)
• DNS PTR: proxy-ca018-san117.ahrefs.net
• Forward Resolution: proxy-ca018-san117.ahrefs.net

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THREAT INDICATORS

Key Concern: The IP carries a DNSBL listing on one of eight monitored lists, indicating prior reputation issues despite current lack of active threat indicators.

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SUBNET CONTEXT (51.222.168.0/24)

The IP operates within a high-risk neighborhood requiring heightened scrutiny:

• Abuse Density: 0.6211 (High)
• Classification: high_abuse
• Active Siblings: 231 of 256 addresses
• Threat Siblings: 159 out of 256 total IPs flagged
• Inherited Risk: 24

Assessment: The /24 subnet exhibits concentrated abuse activity with approximately 62% of active IPs classified as threats. This contextual data elevates the risk profile despite the individual IP's moderate scoring.

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NETWORK SERVICES & BEHAVIOR

• Open Ports: None detected
• HTTP Services: No active web presence
• TLS Certificates: None observed
• Status: Firewalled / No Services
• Control Plane: BGP prefix 51.222.0.0/16, route stability flagged as false

The endpoint shows no active service exposure, suggesting defensive configuration or dormant status. However, the lack of observable services does not eliminate threat potential within a high-abuse subnet.

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OBSERVATION HISTORY

Recent monitoring indicates:

• Total Observations: 23 signals tracked
• Latest Classification: High abuse density subnet (0.6211)
• Ownership Changes: None detected
• Threat Persistence: Single observation event

The IP demonstrates stability in ownership with consistent subnet-level abuse patterns.

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RELATED ENTITIES

• Network Associations: OVH-CUST-281059697 (65 relationship entries)
• Campaign Correlation: None detected
• Certificate Matches: Zero
• Correlated IPs: Zero

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RECOMMENDED ACTIONS

Based on the moderate risk score and high-abuse subnet context, implement the following controls:

Note: Consider blocking the entire /24 subnet (51.222.168.0/24) given the 0.6211 abuse density and 159 threat-sibling count.

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INTELLIGENCE ASSESSMENT

This IP represents a contextual threat rather than an active attacker. The moderate individual risk score is elevated by the high-abuse density of its parent subnet. The Ahrefs.net domain association suggests legitimate hosting, but the presence of 159 threat siblings within the /24 indicates compromised or misconfigured infrastructure sharing.

Priority: Monitor for inbound traffic patterns. If no legitimate traffic is expected from this IP range, implement subnet-level blocking. If business operations require access, maintain IP-level controls with enhanced logging.

Threat Level: MODERATE (contextually elevated)

Action Required: Yes (firewall rule implementation)

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