51.222.168.178📋 Copy

# INTELLIGENCE BRIEFING: 51.222.168.178/32

## EXECUTIVE SUMMARY

Threat Level: Moderate Risk (Score: 40/100)

Classification: Cloud Infrastructure with High-Abuse Neighborhood

Assessment: IP belongs to OVH hosting infrastructure associated with Ahrefs domain. While the specific address shows no direct malicious activity, it operates within a high-abuse subnet (51.222.168.0/24) with 82% abuse density and 210+ threat siblings.

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## PROFILE DETAILS

Ownership:

• Provider: OVH (ASN: 16276)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network: OVH-CUST-281059697
• CIDR Block: 51.222.168.0/24

Geolocation:

• Primary: CA (Canada) / QC (Quebec)
• Secondary: Singapore
• Note: Geographic data shows inconsistencies requiring validation

Network Role:

• Infrastructure Type: CloudCompute
• Classification: Cloud Hosting Provider
• Status: Firewalled/No Services Detected

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## THREAT INDICATORS

Direct Indicators:

• No active blacklist listings
• No known attack campaigns
• Not a Tor exit node
• No spam source designation
• Abuse confidence score: Not applicable

Risk Factors:

• HIGH ABUSE SUBNET: 51.222.168.0/24 classified as "high_abuse"
• Inherited Risk Score: 32/100 (derived from subnet reputation)
• Abuse Density: 0.8203 (82.03% of /24 flagged)
• Threat Siblings: 210 out of 256 active IPs in subnet

Control Plane:

• DNSBL Listed: 1 of 8 total lists
• Route Stability: False (instability detected)
• Operator Score: 0.2174 (Minimal)

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## DOMAIN & DNS ASSOCIATIONS

Resolved Hostname: proxy-ca018-san178.ahrefs.net

Domain: ahrefs.net

Forward Resolution: Confirmed (1 hostname)

Email Authentication:

• SPF: Not configured
• DMARC: Not configured
• TXT Records: 0

*Note: Domain association with Ahrefs (SEO analytics tool) does not indicate malicious intent, but cloud hosting environment with high-abuse subnet requires monitoring.*

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## NETWORK NEIGHBORHOOD ANALYSIS

Subnet: 51.222.168.0/24

• Total Siblings: 256
• Active Siblings: 222
• Threat Siblings: 210
• Sampled Neighbors (100): 100 medium-risk (score 40), 0 high-risk

Risk Pattern: Consistent medium-risk scoring across sampled neighbors suggests systemic risk affecting the entire /24 block rather than isolated incidents.

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## OBSERVATION HISTORY

Temporal Analysis:

• Recent observations (2026-06-15) show consistent risk patterns
• Ownership Changes: 0
• Threat Persistence Days: 0
• Threat Observation Count: 1
• Persistently Malicious: False

Trend: No evidence of escalating or degrading threat profile over observed period. Risk characteristics stable.

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## SECURITY RECOMMENDATIONS

Immediate Actions (Block if Required):

Subnet-Level Recommendation:

Consider evaluating broader blocking for 51.222.168.0/24 given 82% abuse density and 210 threat siblings.

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## INTELLIGENCE NOTES

1. False Positive Risk: Despite high-abuse neighborhood, IP shows no direct malicious indicators. Block decision should weigh business context.

2. Infrastructure Type: Legitimate cloud hosting environment. Ahrefs association suggests potential for legitimate web infrastructure.

3. Monitoring Priority: Medium. Subnet-level threat density warrants continued observation, but isolated blocking may not address underlying risk.

4. Geographic Validation: Inconsistent geolocation data (Canada/Singapore) should be validated before geolocation-based rules.

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Generated: 2026-06-15

Data Sources: IPDebrief Intelligence Platform

Classification: Defensive Security Intelligence

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