51.195.215.27📋 Copy

# IP Intelligence Briefing: 51.195.215.27/32

Classification: Moderate Risk | Risk Score: 50/100 | Date: 2026-06-15

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## Executive Summary

IP address 51.195.215.27 is a cloud-hosted infrastructure endpoint operated by OVH (ASN 16276) on behalf of Ahrefs Pte Ltd Dmytro. The IP resolves to proxy-uk009-san27.ahrefs.net in London, England. While the endpoint shows no active threat indicators or blacklist presence, the parent subnet 51.195.215.0/24 exhibits high abuse density (0.7305), with 187 of 256 sibling IPs flagged as threats. Recommended action: Block at perimeter firewall.

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## Ownership and Infrastructure

The endpoint maintains cloud hosting classification with no open ports or active services detected. DNS resolution confirms association with ahrefs.net domain infrastructure.

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## Geolocation

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## Threat Assessment

Threat Indicators:

• Blacklist Count: 0
• Known Campaigns: None
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• DNSBL Listed: 2 of 8 total lists

Control Plane:

• Route Stability: Unstable
• DNSSEC Valid: Yes
• RPKI State: Not available
• Route Changes (30d): 0
• MoAS Status: False

Risk Breakdown:

• Provider Risk: 0
• Authority Risk: 0
• Stability Score: 0
• Inherited Subnet Risk: 29

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## Network Neighborhood Analysis

Subnet: 51.195.215.0/24

Neighbor Risk Distribution:

• High Risk: 0
• Medium Risk: 98
• Low Risk: 2

The subnet demonstrates elevated abuse activity. Of 256 IP addresses, 187 are classified as threats, with an average risk score of 40 across sampled neighbors. This indicates the subnet hosts compromised or misconfigured endpoints alongside legitimate infrastructure.

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## Historical Observation

Observation Count: 21 signals

Recent Activity (2026-06-15):

• Subnet abuse density signal: 0.7305 (high_abuse classification)
• Ownership stability: 0 changes
• Threat persistence: 0 days
• Threat observation count: 1

Temporal Analysis:

• Ownership Changes: 0
• Persistently Malicious: False
• Threat Persistence Days: 0

The IP shows no evidence of persistent malicious activity. Historical signals indicate single-threat observation patterns without sustained abuse behavior.

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## Relationship Graph

Total Relationships: 36

Key Relationships:

• Multiple "Same Network" associations to OVH_282347345
• No certificate-based or hostname-based correlations beyond ahrefs.net

The relationship graph confirms the IP's integration within OVH's broader network infrastructure.

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## Recommended Security Actions

Primary Recommendation: Block IP at perimeter firewall

Firewall Rules:

• iptables: `iptables -A INPUT -s 51.195.215.27 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 51.195.215.27 drop`
• nginx: `deny 51.195.215.27;`
• pfSense: `51.195.215.27/32`
• Cloudflare WAF: Block with expression `ip.src eq 51.195.215.27`
• AWS WAF: Address: `51.195.215.27/32`

Rationale: The parent subnet's high abuse density (0.7305) combined with the IP's moderate risk score (50) and presence on 2 DNSBLs warrants defensive blocking. While the endpoint shows no direct threat indicators, the neighborhood context suggests elevated risk of abuse or compromise.

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## Intelligence Notes

1. Subnet Context: This IP should be evaluated alongside 51.195.215.0/24 subnet. The 73% abuse density indicates systemic issues within the hosting environment.

2. Service Status: No open ports or active services detected; endpoint appears firewalled.

3. Domain Association: Legitimate association with ahrefs.net infrastructure; blocking should consider business context.

4. Monitoring: Recommend monitoring for new threat indicators as the subnet demonstrates active threat sibling presence.

Analyst Assessment: Moderate risk endpoint within high-abuse subnet. Block recommended for defense-in-depth, with consideration for legitimate business use case.

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*Report generated: 2026-06-15*

*Source: IPDebrief Intelligence Platform*

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