51.222.168.175📋 Copy

# IP INTELLIGENCE BRIEFING: 51.222.168.175

Classification: Moderate Risk / High Abuse Subnet

Date of Analysis: 2026-06-20

Analyst: IPDebrief SOC Intelligence

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## EXECUTIVE SUMMARY

IP 51.222.168.175 is a cloud-compute infrastructure address assigned to OVH hosting under the Ahrefs organization. The IP carries a moderate risk score of 40 and operates within a high-abuse subnet (51.222.168.0/24) with 80.47% abuse density. Geographic inconsistencies and hostname patterns suggest potential hosting of proxy infrastructure for web analytics services.

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## OWNERSHIP & NETWORK ATTRIBUTES

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## GEOLOCATION ANALYSIS

Discrepancy Detected:

• Reported Country: CA (Canada)
• Reported City: Singapore
• Geolocation Plausibility: FALSE
• RTT Violation: 23ms observed vs 112ms minimum expected for 5,598km distance

Assessment: The geolocation data contains significant inconsistencies. The RTT violation indicates the reported location is implausible, suggesting either misconfigured geolocation databases or intentional obfuscation.

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## THREAT INDICATORS

Risk Score: 40 / 100 (Moderate)

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## SUBNET ABUSE CONTEXT

51.222.168.0/24 Neighborhood Analysis:

• Classification: High Abuse
• Abuse Density: 80.47%
• Total Subnet IPs: 256
• Active IPs: 229
• Threat IPs: 206
• Inherited Risk: 32

All sampled neighboring IPs show identical risk profiles (40), indicating systematic abuse patterns across the entire /24 block.

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## OBSERVATION HISTORY

• Total Historical Observations: 23
• Threat Observation Count: 1
• Ownership Changes: 0
• Stability: High (consistent over time)
• Recent signals indicate persistent geolocation inconsistencies

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## SERVICE ENUMERATION

• Open Ports: None detected
• HTTP Services: None detected
• TLS Certificates: None detected
• Reverse DNS: proxy-ca018-san175.ahrefs.net
• Forward Resolution: Unconfirmed

Note: The PTR hostname pattern suggests the IP is designated as a proxy within the Ahrefs network infrastructure.

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## RECOMMENDED ACTIONS

Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 51.222.168.175 -j DROP

# nftables

nft add rule inet filter input ip saddr 51.222.168.175 drop

```

WAF/CDN Recommendations:

• Cloudflare WAF: Block IP
• AWS WAF: Add 51.222.168.175/32 to block list
• pfSense: Block /32 subnet

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## INTELLIGENCE NARRATIVE

The IP 51.222.168.175 operates on OVH cloud infrastructure within the Ahrefs organization. The PTR hostname "proxy-ca018-san175.ahrefs.net" strongly indicates this address serves as a proxy endpoint for web analytics traffic. The subnet exhibits high abuse density with 206 out of 256 IPs classified as threats, suggesting coordinated abuse activity across the entire /24 block.

Geolocation validation failures (RTT violations) indicate the reported Singapore location is inconsistent with network measurements, which may reflect either database errors or intentional location masking.

The moderate risk score (40) combined with the high-abuse neighborhood context warrants defensive blocking, particularly for organizations receiving unsolicited web traffic from this infrastructure. The lack of known malicious campaigns and zero blacklist hits suggests the IP is not currently associated with active threat operations, but rather serves as compromised proxy infrastructure.

Priority Level: Medium

Recommended Action: Block at perimeter firewall with monitoring for subsequent activity

Monitoring Recommendation: Track subnet 51.222.168.0/24 for emerging threat patterns

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