51.222.168.85📋 Copy

## IP Intelligence Briefing: 51.222.168.85/32

Executive Summary

IP address 51.222.168.85 is associated with OVH cloud infrastructure under the Ahrefs organization (ASN 16276). The IP exhibits moderate risk (score: 40/100) with a high-abuse subnet classification. While no direct threat indicators were identified, the IP resides in a neighborhood with 56% abuse density and 140 threat-sibling IPs.

Risk Profile

• Overall Risk Score: 40 (Moderate Risk)
• Provider Risk: 0 (OVH, legitimate cloud provider)
• Authority Risk: 0
• Stability: Unstable route (isRouteStable: false)
• Classification: High-Abuse Subnet (51.222.168.0/24)

Geolocation & Ownership

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 51.222.168.0/24
• Geolocation: Canada (CA) with low confidence (35%), conflicting data shows Singapore location with 3000km accuracy radius
• Infrastructure Type: CloudCompute
• Service Status: Firewalled/No Services detected

Network Context

• Subnet Abuse Density: 0.56 (High)
• Total Sibling IPs: 250
• Active Siblings: 202
• Threat Siblings: 140 (56% of active IPs flagged as threats)
• Inherited Risk: 22

DNS & Network Behavior

• PTR Hostname: proxy-ca018-san85.ahrefs.net
• DNS Resolution: Forward confirmed to ahrefs.net domain
• Open Ports: None detected
• TLS/Servers: No active HTTP/TLS services observed
• DNSSEC: Valid
• DNSBL Listed: 1 of 8 lists

Threat Indicators

• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Blacklist Count: 0
• Known Campaigns: None correlated
• Campaign Likelihood: None

Historical Observations

20 signal observations recorded. Recent activity confirms:

• Consistent cloud infrastructure classification
• Stable provider association (OVH)
• Geographic signals fluctuating between Canada and other regions
• Abuse density signal persistently at 0.56

Relationships

• Network: OVH-CUST-281059697 (multiple associations)
• DNS: proxy-ca018-san85.ahrefs.net (Ahrefs)
• No external certificate or organizational relationships detected

Recommended Actions

Based on risk score 40 and high-abuse subnet classification:

Firewall Rules:

• iptables: `iptables -A INPUT -s 51.222.168.85 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 51.222.168.85 drop`
• nginx: `deny 51.222.168.85;`

Cloud/CDN Recommendations:

• Cloudflare WAF: Block with expression `ip.src eq 51.222.168.85`
• AWS WAF: Add IP 51.222.168.85/32 to block list

Analyst Notes

This IP appears to be part of a legitimate Ahrefs infrastructure but operates within a high-abuse subnet. The moderate risk score (40) combined with 56% subnet abuse density warrants cautious treatment. SOC teams should consider:

• Blocking at perimeter if traffic is unexpected
• Monitoring for anomalous activity patterns
• Correlating with known Ahrefs traffic baselines
• Noting the route instability which may indicate dynamic infrastructure changes

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*Intel generated by IPDebrief. Review against local threat context before enforcement.*

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