5.39.1.243📋 Copy

# IP INTELLIGENCE BRIEFING

Target IP: 5.39.1.243/32

Classification: Moderate Risk (Score: 40)

Date: 2026-06-18

Classification: Cloud Infrastructure — OVH, France

---

## EXECUTIVE SUMMARY

IP address 5.39.1.243 is a cloud computing endpoint hosted on OVH infrastructure in France (FR). The IP demonstrates moderate risk characteristics with a risk score of 40. The broader /24 subnet (5.39.1.0/24) exhibits high abuse density (0.8438), with all 31 neighboring IPs classified as medium risk. Forward DNS resolution confirms association with ahrefs.net domain infrastructure. No open services detected; the endpoint is firewalled.

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## OWNERSHIP & NETWORK ATTRIBUTES

• ASN: 16276 (OVH SAS)
• Organization: Ahrefs Pte Ltd Dmytro
• RIR: RIPE (Registration confirmed)
• Infrastructure Type: CloudCompute
• Connection Type: Hosting infrastructure
• DNS PTR: proxy-fr005-san243.ahrefs.net
• Forward Resolution: Confirmed to ahrefs.net domain

---

## THREAT INDICATORS

• Abuse Confidence: Not explicitly flagged as known attacker or spam source
• Tor Exit Node: No
• Known Campaigns: None correlated
• Blacklist Status: Listed on 1 of 8 DNSBL checks
• Threat Feeds: No active indicators
• Service Exposure: No open ports detected (firewalled/no services)

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## NEIGHBORHOOD ANALYSIS

The /24 subnet (5.39.1.0/24) shows elevated risk patterns:

• Total Siblings: 32
• Active Siblings: 13
• Threat Siblings: 27
• Abuse Density: 0.8438 (High Abuse Classification)
• Inherited Risk: 33
• Risk Distribution: 31 medium risk, 0 high risk, 0 low risk

Notable High-Risk Neighbors:

• 5.39.1.240 (Risk: 65)
• 5.39.1.237, 5.39.1.239, 5.39.1.247, 5.39.1.253 (Risk: 50)

---

## OBSERVATION HISTORY

Total Observations: 25 signals recorded

Recent Signal Timeline:

• 2026-06-18 11:37:55: Abuse density 0.8438, high_abuse classification, inherited risk 33
• 2026-06-18 11:35:38: Operator score 0.2174 (Minimal), DNSSEC validation present
• 2026-06-14 03:52:57: Geographic location FR (France) with 0.52 confidence

Temporal Analysis:

• Ownership changes: 0
• Threat persistence days: 0
• Not persistently malicious
• Route stability: Stable (delegation age: 9,217 days)

---

## NETWORK CLASSIFICATION

• Provider: OVH
• Infrastructure Type: Cloud Compute
• Connection Type: Hosting
• Cloud Provider: Yes
• CDN: No
• VPN: No
• Proxy: No
• Mobile/Residential: No

---

## CONTROL PLANE DATA

• BGP Prefix: 5.39.0.0/17
• AS Path: 34549 → 16276
• RPKI State: Not validated
• IRR Consistency: Not validated
• Route Changes (30d): 0
• DNSSEC: Valid
• CAA Records: Present
• DNSBL Listed: 1 of 8 lists

---

## RECOMMENDED ACTIONS

Risk-Based Recommendations: Block traffic from this IP address.

Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 5.39.1.243 -j DROP

# nftables

nft add rule inet filter input ip saddr 5.39.1.243 drop

# nginx

deny 5.39.1.243;

# pfSense

5.39.1.243/32

# Cloudflare WAF

Block 5.39.1.243 — IPDebrief risk score 40

# AWS WAF

Addresses: [5.39.1.243/32]

Description: IPDebrief risk 40

```

---

## INTELLIGENCE CONTEXT

This IP is part of OVH cloud infrastructure that services the ahrefs.net domain. While no direct malicious activity is observed for this specific endpoint, the high abuse density in the parent subnet warrants monitoring. The combination of cloud hosting, DNSBL listing, and neighborhood risk suggests this endpoint may be utilized for legitimate services with incidental abuse, or as infrastructure for hosting potentially problematic content.

Recommendation: Block at perimeter, monitor for any traffic patterns that indicate abuse escalation. Consider subnet-level monitoring due to high neighborhood risk density.

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