54.39.136.159📋 Copy

# IP INTELLIGENCE BRIEFING

Target: 54.39.136.159/32

Date: 2026-06-20

Classification: Moderate Risk / Cloud Infrastructure

---

## EXECUTIVE SUMMARY

IP 54.39.136.159 is a cloud compute endpoint operated by OVH under network OVH-CUST-281059681. The IP resolves to ahrefs.net infrastructure (proxy-ca002-san159.ahrefs.net) and is hosted in Beaucharnois, Quebec, Canada. While the IP itself shows no active threat indicators, it resides within a subnet (54.39.136.0/24) with elevated abuse density (60.94%), requiring contextual monitoring.

---

## INFRASTRUCTURE PROFILE

---

## THREAT INDICATORS

Direct Threat Signals: None detected

• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No
• Blacklist Count: 0
• Threat Campaigns: None correlated
• Abuse Confidence Score: Not applicable

Control Plane:

• Route Stable: Yes (0 changes in 30 days)
• DNSSEC Valid: Yes
• RPKI State: Not verified
• DNSBL Listed: 2 of 8 total lists

---

## NEIGHBORHOOD ANALYSIS

Subnet: 54.39.136.0/24

• Abuse Density: 60.94% (High)
• Active Siblings: 158 of 256
• Threat Siblings: 156
• Inherited Risk Score: 24
• Risk Distribution: 100 medium-risk, 0 high-risk neighbors

Context: The subnet exhibits elevated abuse density typical of shared cloud hosting environments. The target IP's risk profile is consistent with infrastructure hosting for ahrefs.net, a legitimate competitive intelligence platform.

---

## OBSERVATION HISTORY

Total Observations: 22

Recent Activity: 2026-06-20 (2 observations)

Route Stability: Stable (allocated 2011-02-15, 9,251 days)

Ownership Changes: None

Threat Persistence: 0 days

---

## RECOMMENDED ACTIONS

Classification: Monitor / Contextual Review

Firewall Rules (Recommended):

```bash

# iptables

iptables -A INPUT -s 54.39.136.159 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.136.159 drop

# Cloudflare WAF

Block 54.39.136.159 — IPDebrief risk score 50

```

SOC Analyst Guidance:

1. Do not block immediately — IP resolves to legitimate ahrefs.net infrastructure

2. Monitor subnet traffic — 60% abuse density suggests elevated neighborhood risk

3. Contextual correlation required — verify if traffic patterns align with expected ahrefs.net operations

4. Consider subnet-level policies — 156 threat siblings may warrant broader mitigation

---

## INTELLIGENCE NOTES

The IP appears to be part of OVH's cloud hosting infrastructure for ahrefs.net (SEO/competitive intelligence services). No direct malicious indicators detected, but subnet abuse density warrants heightened awareness. Traffic from this IP should be evaluated based on behavioral patterns rather than IP reputation alone.

Report Generated: IPDebrief Intelligence Platform

Data Confidence: Medium (22 historical observations, no active service enumeration)

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