51.161.37.33📋 Copy

# IP Intelligence Briefing: 51.161.37.33/32

Classification: Moderate Risk / High-Abuse Subnet

Date: Current

Analyst: IPDebrief Intelligence Team

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## Executive Summary

IP 51.161.37.33 operates on OVH hosting infrastructure (ASN 16276) within Montreal, QC, Canada. The IP carries a risk score of 40 (Moderate Risk) and is part of subnet 51.161.37.0/24, which exhibits high abuse density (0.7422). No direct threat indicators were observed, but the neighborhood context requires elevated monitoring.

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## Ownership & Infrastructure

The IP resolves to PTR hostname `proxy-ca005-san33.ahrefs.net` with domain ahrefs.net. Forward DNS resolution is unconfirmed. Email authentication is absent (no SPF or DMARC records).

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## Threat Assessment

Risk Score: 40 (Moderate)

Abuse Confidence: Not Available

Threat Indicators: None observed

• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Blacklist Count: 0
• Campaign Correlation: None

No active threat campaigns or correlated IP indicators were identified. The IP does not exhibit persistent malicious behavior across the observation period.

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## Neighborhood Context

Subnet: 51.161.37.0/24

Abuse Density: 0.7422 (High Abuse)

Classification: High Abuse

The subnet demonstrates elevated abuse activity with 190 threat-sibling IPs out of 206 active addresses. This indicates a high-abuse cloud environment typical of shared OVH hosting.

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## Geolocation Validation

Status: ⚠️ DATA VIOLATION DETECTED

• Reported Location: Montreal, QC, Canada
• RTT Violation: 29ms observed vs. 121.6ms minimum possible for 6,082km distance
• Distance from Probe: 6,082km
• Probe Count: 5

Geolocation data is implausible. The IP is not genuinely located in Canada based on RTT analysis. This may indicate routing anomalies or inaccurate geolocation databases.

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## Observation History

Total Observations: 21

Recent observations (June 15-28, 2026) show:

• Consistent classification as cloud hosting on OVH
• Persistent high-abuse subnet classification
• No escalation in threat signals
• No new threat indicators or campaign associations

The IP has maintained a stable risk profile with no evidence of escalating malicious activity.

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## Network Classification

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## Recommended Actions

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## Intelligence Assessment

This IP is hosted on OVH cloud infrastructure with moderate risk characteristics. While the IP itself lacks direct threat indicators, its placement in a high-abuse subnet (190/206 threat siblings) warrants defensive measures. The geolocation data should be treated as unreliable due to RTT violations.

Recommended SOC Response:

1. Implement blocking rules at perimeter firewalls

2. Monitor subnet 51.161.37.0/24 for correlated activity

3. Consider blocking entire /24 if operational constraints allow

4. Monitor for any changes in risk profile or new threat indicators

Confidence Level: Moderate — Risk is elevated by neighborhood context despite clean individual IP profile.

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