54.39.203.137📋 Copy

# INTELLIGENCE BRIEFING: IP 54.39.203.137/32

Classification: MODERATE RISK | Report Date: June 2026 | Analyst: IPDebrief Intelligence Team

---

## EXECUTIVE SUMMARY

IP 54.39.203.137 is a cloud compute host within OVH infrastructure, resolving to ahrefs.net DNS. The IP exhibits moderate risk (score: 40) but belongs to a subnet with HIGH ABUSE density. While the specific IP shows no direct malicious indicators, its neighborhood context warrants monitoring.

---

## TECHNICAL PROFILE

Infrastructure:

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 54.39.203.0/24
• Geolocation: Beauharnois, QC, Canada (3000km accuracy radius)
• Infrastructure Type: CloudCompute (OVH hosting)

DNS Resolution:

• PTR Hostname: proxy-ca008-san137.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: Confirmed to ahrefs.net domain
• Email Auth: SPF/DMARC not configured

Service Status:

• Open Ports: None detected
• HTTP/TLS: No services running
• Status: Firewalled / No Services

---

## THREAT ASSESSMENT

Direct Indicators:

• Risk Score: 40/100 (Moderate)
• Abuse Confidence: None detected
• Blacklist Count: 0
• Known Campaigns: None
• Tor Exit/Proxy: No
• Spam Source: No

Control Plane:

• BGP Prefix: 54.39.0.0/16
• Route Stability: False
• DNSSEC: Valid
• DNSBL Listed: 1/8 lists

---

## NEIGHBORHOOD ANALYSIS

Subnet Risk Profile (54.39.203.0/24):

• Classification: HIGH ABUSE
• Abuse Density: 0.6484 (64.84%)
• Inherited Risk Score: 25/100
• Total Siblings: 256 IPs
• Active Siblings: 209
• Threat Siblings: 166 (64.8% of active IPs)

Risk Distribution:

• High Risk: 0
• Medium Risk: 100
• Low Risk: 0

Neighborhood Context: The IP shares a subnet with 166 threat-sibling IPs, indicating this /24 block is associated with elevated abuse activity.

---

## OBSERVATION HISTORY

Total Signals: 19 observations

Recent Activity (June 2026):

• 2026-06-15: DNS resolution to ahrefs.net (confidence: 0.80)
• 2026-06-15: Subnet abuse density classification: HIGH ABUSE (confidence: 0.75)
• 2026-06-15: Operator score: 0.2174 (Minimal)
• 2026-06-10: Campaign likelihood: None

Persistence Indicators:

• Threat Persistence Days: 0
• Ownership Changes: 0
• Not persistently malicious

---

## RELATIONSHIP GRAPH

Primary Associations:

• 39 relationships identified
• Dominant Type: Same Network (OVH-CUST-281059687)
• No organization-to-organization cross-references
• No certificate or hostname associations beyond ahrefs.net

---

## RECOMMENDATIONS

For SOC Analysts:

1. Monitor Neighborhood Context: The subnet 54.39.203.0/24 shows HIGH ABUSE density (64.84% threat siblings). Monitor traffic patterns from this /24 block for correlation with known threat activity.

2. Allow with Scrutiny: The IP resolves to ahrefs.net (legitimate SEO tool provider). Permitted traffic is acceptable, but monitor for anomalies given the subnet's abuse profile.

3. No Immediate Block Required: No direct threat indicators on this specific IP. No firewall rules recommended at this time.

4. Long-term Observation: Track subnet-level abuse patterns. If threat sibling count increases or the IP's own risk score escalates, reassess blocking posture.

5. Email Reputation: SPF and DMARC not configured for ahrefs.net at this host. Verify email authentication if this IP is used for mail relay.

---

END OF BRIEFING

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