54.39.6.7📋 Copy

# IP Intelligence Briefing: 54.39.6.7/32

Classification: Moderate Risk

Analysis Date: Current

Provider: OVH SAS (ASN 16276)

Infrastructure Type: Cloud Compute

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## Executive Summary

IP 54.39.6.7 is a cloud-hosted address within OVH's Canadian infrastructure, operating under the Ahrefs organization. The IP presents moderate risk (score 40/100) with no open ports detected. However, it resides in a high-abuse density subnet (54.39.6.0/24) with 174 threat siblings identified among 256 total addresses. Geolocation validation indicates implausible data, with RTT measurements suggesting false location claims.

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## Technical Profile

Network Registration:

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.6.0/24
• Abuse Contact: None publicly listed
• BGP Path: 1403 → 16276
• Route Stability: Stable (no route changes in 30 days)

Geolocation:

• Claimed Location: Beaucharnois, QC, Canada
• Validation Status: Implausible
• Observed RTT: 27-43ms
• Expected RTT: 112.6+ms (distance: 5,629km)
• Conclusion: Location data does not match network performance metrics

DNS Analysis:

• PTR Record: proxy-ca001-san7.ahrefs.net
• Forward Resolution: Confirms ahrefs.net domain
• Email Security: No SPF or DMARC records configured
• TXT Records: None

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## Threat Assessment

Current Risk Level: Moderate (40/100)

Abuse Confidence: Data inconsistent with active abuse indicators

Threat Indicators: None directly associated with this specific IP

Blacklist Status: Listed on 1 of 8 DNSBLs

Network Context:

• Subnet Classification: High Abuse (0.6797 abuse density)
• Threat Siblings: 174 IPs flagged as threats within /24
• Active Siblings: 187 IPs currently observed
• Risk Distribution in Subnet: 43 medium risk, 57 low risk

Historical Activity:

• Total Observations: 22 signals
• Recent Activity: Port scanning detected (June 2026)
• Threat Persistence: Low (1 threat observation period)

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## Observations

Recent signal history reveals:

1. Port Scanning Activity - Multiple port scans observed with nested data

2. Subnet Abuse Correlation - High abuse density signals consistently detected

3. Geolocation Inconsistencies - Multiple sources report conflicting location data

4. RTT Anomalies - Sustained violation of minimum possible RTT for claimed distance

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## Recommended Actions

Based on risk profile and subnet context, the following defensive measures are recommended:

Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 54.39.6.7 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.6.7 drop

# NGINX

deny 54.39.6.7;

```

WAF Configuration:

• Cloudflare: Block with expression `ip.src eq 54.39.6.7`
• AWS WAF: Add `54.39.6.7/32` to IP set

Strategic Considerations:

• Consider blocking the entire /24 subnet if traffic permits (174 threat siblings)
• Monitor for lateral movement patterns from related subnet addresses
• Note that infrastructure serves Ahrefs-related services; evaluate business context before blocking

---

## Intelligence Notes

This IP demonstrates characteristics common to cloud infrastructure hosting services with limited security controls. The subnet-level abuse density suggests potential compromised hosts or misconfigured services. The geolocation implausibility indicates either VPN/proxy usage or data center misconfiguration. SOC teams should correlate with organizational traffic policies and consider the legitimate business context (Ahrefs web services) before implementing blocking measures.

Status: Monitor or Block Based on Policy

Priority: Medium

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