51.161.37.150📋 Copy

# IP Intelligence Briefing: 51.161.37.150/32

## Executive Summary

IP 51.161.37.150 is a moderate-risk (40/100) infrastructure IP assigned to OVH hosting infrastructure in Montreal, Canada. The address resolves to a hostname associated with Ahrefs (proxy-ca005-san150.ahrefs.net) but lacks direct threat indicators. However, the /24 subnet exhibits high abuse density (0.75) with 192 threat-sibling IPs, suggesting potential collateral risk from the shared hosting environment.

## Ownership and Infrastructure

• ASN: 16276
• Organization: Dmytro, Ahrefs Pte Ltd
• Netname: OVH-CUST-281059684
• Location: Canada (QC), Montreal (3000km accuracy radius)
• Infrastructure Type: Cloud Compute / Hosting
• DNS PTR: proxy-ca005-san150.ahrefs.net
• Domain: ahrefs.net
• BGP Prefix: 51.161.0.0/17

## Risk Assessment

• Overall Risk Score: 40 (Moderate)
• Operator Score: 0.2174 (Minimal)
• Risk Classification: Moderate Risk
• Abuse Confidence Score: Not Available
• Blacklist Status: 0 direct blacklists, 1 DNSBL listing across 8 total lists

## Threat Indicators

No active threat indicators detected:

• Not a known attacker
• Not a spam source
• Not a Tor exit node
• No known campaign associations
• No detected honeypot hits

## Neighborhood Analysis

The /24 subnet (51.161.37.0/24) demonstrates elevated abuse characteristics:

• Abuse Density: 0.75 (High)
• Classification: high_abuse
• Total Siblings: 256
• Active Siblings: 208
• Threat Siblings: 192
• Inherited Risk: 30

Neighboring IPs show consistent risk scoring (40/100) with authority scores of 50, indicating widespread OVH hosting infrastructure deployment.

## Observation History

18 observations recorded with recent signals indicating:

• Provider confirmation: OVH (confidence 0.85)
• Geolocation: Canada (confidence 0.35)
• Abuse density classification: high_abuse (confidence 0.75)
• Operator assessment: Minimal (confidence 0.60)

## Network Behavior

• Open Ports: None detected
• Services: None exposed (Firewalled / No Services)
• TLS Certificate: Not detected
• HTTP Response: Not detected
• Route Stability: Unstable (0 route changes in 30d)

## Recommended Actions

No specific firewall or mitigation rules generated. However, SOC teams should:

• Monitor for lateral movement if the IP is observed in threat logs
• Evaluate inbound connection patterns given the high-abuse subnet classification
• Consider enhanced logging for sessions originating from this /24 subnet

## Conclusion

IP 51.161.37.150 represents infrastructure-level hosting with no direct malicious indicators. The moderate risk score is primarily driven by the high-abuse density of the parent subnet rather than confirmed malicious activity on this specific address. Routine monitoring is recommended, particularly given the 192 threat-sibling IPs within the /24 block.

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