51.161.65.76📋 Copy

# IP INTELLIGENCE BRIEFING: 51.161.65.76/32

## EXECUTIVE SUMMARY

IP 51.161.65.76 is a cloud-based infrastructure address hosted on OVH SAS (ASN 16276) in Montreal, Canada. The address carries a moderate risk score of 40 and operates under the Ahrefs organization (OVH-CUST-281059690). While no active threat indicators were identified, the subnet demonstrates elevated abuse density characteristics requiring monitoring.

## INFRASTRUCTURE PROFILE

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 51.161.65.0/24
• Geolocation: Montreal, QC, Canada (43.6319°N, -79.3716°W)
• Infrastructure Type: Cloud Compute
• Network Role: Firewalled / No Services Detected

## RISK ASSESSMENT

Current Risk Score: 40 (Moderate Risk)

Risk Indicators:

• No active threat indicators (malware, scanners, known attackers)
• No blacklist entries detected
• No active security campaigns correlated
• Zero open ports identified

Control Plane Analysis:

• Route stability: False (routing changes observed)
• DNSSEC validated
• 8 DNSBL lists checked with 1 listing found
• Operator score: 0.2174 (Minimal)

## SUBNET ANALYSIS: 51.161.65.0/24

Abuse Density: 0.6914 (High Abuse Classification)

• Total Subnet Siblings: 256
• Active Siblings: 207
• Threat Siblings: 177

The subnet exhibits elevated abuse density with 69% of IPs classified as threat actors. This IP inherits a risk score of 27 from neighborhood context.

## GEOGRAPHIC VALIDATION

Status: GEOGRAPHIC INCONSISTENCY DETECTED

• Claimed Location: Montreal, QC, Canada
• Observed RTT: 27-36ms (average: 29.6ms)
• Minimum Possible RTT for Distance: 121.6ms
• Distance from Probe: 6,082 km

The RTT data indicates the actual server location is significantly closer than the claimed Montreal position, suggesting potential geolocation spoofing or routing anomalies.

## OBSERVATION HISTORY

Total Observations: 21 signals recorded

Recent intelligence signals indicate:

• Subnet consistently classified as "high_abuse" with 0.6914 abuse density
• Operator classification remains "Minimal" risk
• Geographic validation failures persist across observations
• No persistent malicious behavior detected

## RELATIONSHIP GRAPH

Total Relationships: 39 entities identified

• Primary relationship: Same Network (OVH-CUST-281059690)
• No external organizational or hostname associations beyond network-level relationships
• No certificate relationships or campaign links

## SERVICE ANALYSIS

• Open Ports: None detected
• TLS Certificates: None
• HTTP Services: None
• DNS PTR: proxy-ca011-san76.ahrefs.net

## RECOMMENDED ACTIONS

Defense Posture:

• Monitor subnet-wide activity given high abuse density (0.6914)
• Implement connection rate limiting for this subnet if traffic observed
• No immediate blocking required due to moderate risk profile and lack of active threats
• Monitor geographic anomalies for potential spoofing activity
• Consider geo-blocking if legitimate traffic should originate from claimed Montreal location

Intelligence Note: The Ahrefs hosting relationship suggests this IP may be associated with legitimate SEO/traffic analytics infrastructure. The geographic inconsistency warrants monitoring but does not indicate malicious activity.

---

*Report generated from IPDebrief intelligence platform data. Classification: Defensive Security Intelligence.*

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