51.195.215.127📋 Copy

# IP INTELLIGENCE BRIEFING

Target: 51.195.215.127/32

Classification: MODERATE RISK / HIGH ABUSE SUBNET

Date: Analysis completed via IPDebrief Intelligence Platform

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## EXECUTIVE SUMMARY

IP address 51.195.215.127 resolves to Ahrefs Pte Ltd infrastructure hosted on OVH CloudCompute platform (AS16276) in London, United Kingdom. The IP presents moderate risk (Score: 50) but operates within a high-abuse density subnet (51.195.215.0/24) with 188 out of 256 total siblings (73% abuse density). No active malicious indicators detected on the IP itself; risk stems primarily from neighborhood context.

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## OWNERSHIP & GEOLLOCATION

DNS Resolution: proxy-uk009-san127.ahrefs.net

Forward Resolution: Confirmed for ahrefs.net domain

PTR Record: proxy-uk009-san127.ahrefs.net

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## THREAT ASSESSMENT

Current Risk Profile

• Overall Risk Score: 50 (Moderate)
• Abuse Confidence Score: Not applicable
• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No
• Blacklist Count: 0 (Direct lists)
• DNSBL Listings: 2 (Control plane data)

Control Plane Indicators

• BGP Prefix: 51.195.0.0/16
• RPKI State: Not validated
• Route Stability: Not stable
• MOAS Status: No
• DNSSEC Valid: Yes
• CAA Records: Present

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## SUBNET CONTEXT (51.195.215.0/24)

The target IP operates within a subnet showing elevated abuse activity:

Risk Distribution in Subnet:

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

Analysis: The subnet demonstrates concentrated abuse activity (73% threat density). While the target IP itself lacks direct threat indicators, the neighborhood context warrants defensive consideration.

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## OBSERVATION HISTORY

Total Observations: 17 signals across 7 days

Key temporal findings:

• June 15, 2026: Subnet abuse density confirmed at 0.7344 (high_abuse classification)
• June 15, 2026: Operator score 0.2174 (minimal)
• June 08, 2026: Port scan detected; no open services identified
• June 08, 2026: Geo-location inference: GB with 28% confidence (multi-signal inference)

Status: IP has been persistently assigned to Ahrefs infrastructure with no ownership changes detected.

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## NETWORK RELATIONSHIPS

Primary Relationships:

• Network: OVH_282347345 (30 duplicate entries indicating infrastructure clustering)
• Hostname: proxy-uk009-san127.ahrefs.net (17 DNS association records)

Correlated Infrastructure: Multiple entries indicate this IP is part of a larger Ahrefs proxy infrastructure cluster.

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## SERVICES & PORTS

• Open Ports: None detected (firewalled/no services)
• TLS Certificate: Not available
• HTTP Title: Not available
• Server Banner: None
• SSL/TLS: No active certificates

Note: The IP appears to be configured as a proxy endpoint without publicly accessible services.

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## RECOMMENDED ACTIONS

Immediate Defensible Actions

Based on risk score (50) and subnet abuse context, the following controls are recommended:

Firewall Rules:

• iptables: `iptables -A INPUT -s 51.195.215.127 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 51.195.215.127 drop`
• nginx: `deny 51.195.215.127;`
• pfSense: `51.195.215.127/32` (block rule)

WAF Configuration:

• Cloudflare WAF: Block IP with expression `ip.src eq 51.195.215.127`
• AWS WAF: Add IP 51.195.215.127/32 to block set

Strategic Recommendations

1. Monitor Subnet: The 51.195.215.0/24 subnet shows 73% abuse density. Consider implementing subnet-level monitoring or blocking for the entire /24 if traffic patterns permit.

2. Ahrefs Infrastructure: This is legitimate Ahrefs proxy infrastructure. If your organization uses Ahrefs services, consider whitelist exceptions for specific IPs.

3. No Direct Threat Indicators: The IP itself lacks known malicious indicators. Blocking should be based on policy/neighborhood risk rather than direct threat intelligence.

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## INTELLIGENCE NOTES

• The IP belongs to Ahrefs Pte Ltd, a legitimate SEO analytics company
• Infrastructure hosted on OVH CloudCompute (London, UK)
• No active threat indicators on the IP; risk is contextual (subnet abuse density)
• Services are not publicly accessible (firewalled/no open ports)
• Consider operational context before applying blocking controls

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Report Generated: IPDebrief Intelligence Platform

Data Confidence: Moderate to High (17 historical observations, multiple signal types)

Classification: Internal Use Only

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