51.195.244.8📋 Copy

# IP Intelligence Briefing: 51.195.244.8

Date: 2026-06-14

Status: Moderate Risk

Provider: OVH (ASN 16276)

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## Executive Summary

IP 51.195.244.8 is a cloud-compute host located in London, GB, associated with Ahrefs Pte Ltd infrastructure. While the individual IP shows moderate risk (score: 40) with no active services, the broader /24 subnet (51.195.244.0/24) exhibits high abuse density (0.7137) with 182 malicious siblings identified. No persistent malicious behavior observed.

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## Technical Profile

Ownership & Registration:

• Organization: Ahrefs Pte Ltd Dmytro
• ASN: 16276 (OVH SAS)
• RIR: ARIN
• CIDR Block: 51.195.0.0/16

Geolocation:

• Country: GB (United Kingdom)
• City: London
• Accuracy Radius: 750 km
• Geo Consensus: True (1 source)
• Minimum Possible RTT: 9.5 ms

Network Classification:

• Infrastructure Type: CloudCompute
• Is Cloud: Yes
• Is Hosting: Yes
• Service Status: Firewalled / No Services Open
• Connection Type: None detected

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## Threat Assessment

Risk Indicators:

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

DNS Analysis:

• PTR Hostnames: proxy-uk000-san8.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: 1 hostname
• DNSBL Listed: 1 of 8 lists
• DNSSEC Valid: Yes
• CAA Records: Present

Control Plane:

• Origin ASN: 16276
• BGP Prefix: 51.195.0.0/16
• Route Stability: Stable (0 changes in 30 days)
• Operator Score: 0.4783 (Basic)

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## Neighborhood Analysis (51.195.244.0/24)

Subnet Risk Profile:

• Abuse Density: 0.7137 (High)
• Classification: high_abuse
• Inherited Risk: 28
• Total Siblings: 255
• Active Siblings: 198
• Threat Siblings: 182
• Medium Risk Neighbors: 100
• High Risk Neighbors: 0

Implication: The /24 subnet demonstrates elevated abuse activity, suggesting this IP is part of a larger OVH cloud deployment that may host both legitimate and malicious workloads.

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## Relationship Graph

Detected Relationships: 73 total

• Primary Associations: Same network (OVH_282347336) - 68+ entries
• No correlated campaign matches
• No certificate associations
• No banner matches

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## Historical Observations (28 total)

Temporal Trends:

• Consistent geolocation: London, GB
• Consistent abuse density classification: high_abuse
• Operator score stable: 0.4783
• No ownership changes
• No persistent malicious activity detected
• Most recent observations: 2026-06-14

Key Pattern: The IP maintains consistent network characteristics over time with no escalation or de-escalation in risk profile.

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## Recommended Actions

1. Traffic Filtering:

• Block inbound traffic on this IP at perimeter firewall
• Rule applicable: `iptables -A INPUT -s 51.195.244.8/32 -j DROP`

2. Network-Level Mitigation:

• Consider blocking entire /24 subnet (51.195.244.0/24) due to high abuse density
• Monitor for lateral movement to related OVH infrastructure

3. Threat Hunting:

• Investigate correlation with 182 other threat IPs in subnet
• Review logs for connections to known malicious IPs within 51.195.0.0/16 range

4. Allow List Consideration:

• Verify against known Ahrefs service endpoints before allowing traffic
• DNS records indicate legitimate proxy hostname (proxy-uk000-san8.ahrefs.net)

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## Confidence Assessment

Data Confidence: Moderate

• Geolocation validation: 5 probe attempts, 750 km accuracy radius
• Multiple historical observations confirm consistency
• No conflicting threat indicators

Threat Confidence: Low to Moderate

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Threat Confidence: Low to Moderate

• Individual IP shows no active malicious indicators
• Neighborhood context suggests elevated risk environment
• No campaign correlations or persistent threat behavior detected

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## Conclusion

IP 51.195.244.8 presents a moderate risk profile within a high-abuse cloud infrastructure context. While the individual address shows no active malicious behavior, the surrounding /24 subnet demonstrates significant abuse density (182 malicious siblings). This warrants defensive caution and consideration of subnet-level blocking if threat correlation analysis confirms risk.

Final Recommendation: Implement traffic filtering with awareness of legitimate business use case (Ahrefs proxy infrastructure) while maintaining monitoring for malicious activity patterns from this cloud deployment.

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