54.39.203.11📋 Copy

# INTELLIGENCE BRIEFING: IP 54.39.203.11/32

Date: 2026-06-28

Classification: MODERATE RISK

Report Type: Threat Intelligence Summary

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## EXECUTIVE SUMMARY

IP address 54.39.203.11 presents moderate risk (score: 50) with significant contextual threat indicators derived from its high-abuse network environment. While the IP itself shows no direct threat signatures, its operational context within a heavily utilized OVH cloud subnet warrants defensive consideration.

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## NETWORK PROFILE

Infrastructure Classification:

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.203.0/24
• RIR: ARIN
• Infrastructure Type: CloudCompute / Hosting Provider
• Network Role: Firewalled / No Active Services

Geolocation:

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Geolocation Validity: ⚠️ INCONSISTENT

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## THREAT ASSESSMENT

Direct Threat Indicators:

• Blacklist Count: 0
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Active Threat Feeds: None

Control Plane Analysis:

• Route Stability: Unstable
• DNSSEC Validation: Valid
• CAA Records: Present
• DNSBL Listings: 2 of 8 total lists

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## SUBNET ANALYSIS (54.39.203.0/24)

Abuse Profile:

• Abuse Density: 0.6719 (High Abuse Classification)
• Total Subnet IPs: 256
• Active Siblings: 225
• Threat Siblings: 172
• Inherited Risk Score: 26

Risk Distribution:

• High Risk: 0 IPs
• Medium Risk: 36 IPs
• Low Risk: 64 IPs

Assessment: The /24 subnet demonstrates elevated abuse activity. Of 225 active IPs, 172 (76.4%) exhibit threat indicators, suggesting this IP operates within a high-risk network environment.

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## OBSERVATION HISTORY

Temporal Analysis: 21 observations collected

Key Signals:

1. Operator Score: 0.2174 (Minimal)

2. Subnet Abuse Density: Consistently 0.6719 across recent observations

3. Signal Consistency: No significant risk trajectory changes detected

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## DNS & SERVICE ANALYSIS

DNS Records:

• PTR Hostname: proxy-ca008-san11.ahrefs.net
• Forward Resolution: proxy-ca008-san11.ahrefs.net
• Forward Confirmed: No
• Associated Domain: ahrefs.net

Service Status:

• Open Ports: None detected
• HTTP Services: None
• TLS Certificates: None
• Conclusion: IP appears firewall-configured with no public-facing services

Email Authentication:

• SPF Record: Absent
• DMARC Record: Absent
• TXT Records: 0

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## RELATIONSHIP ANALYSIS

Identified Relationships: 38 total

• All relationships map to same network identifier: OVH-CUST-281059687
• No organizational, hostname, or certificate-based relationships detected

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## GEOLOCATION VALIDATION

Data Quality Flag: ⚠️ ANOMALY DETECTED

• Reported Distance: 5,628.6 km
• Minimum Possible RTT: 112.6 ms
• Observed RTT: 27 ms
• Probe Count: 5

Assessment: RTT measurements indicate the geolocation data is implausible for the reported location, suggesting either routing anomalies or location data inaccuracies.

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## RECOMMENDED ACTIONS

Based on risk profile and neighborhood context, the following actions are recommended:

Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 54.39.203.11 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.203.11 drop

# NGINX

deny 54.39.203.11;

# pfSense

54.39.203.11/32

```

WAF Configuration:

• Cloudflare WAF: Block with expression `ip.src eq 54.39.203.11`
• AWS WAF: Add address `54.39.203.11/32`

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## INTELLIGENCE CONCLUSIONS

1. Primary Risk Factor: High-abuse subnet environment (67% abuse density) rather than direct threat indicators

2. Operational Context: Cloud hosting infrastructure with firewall configuration

3. Threat Profile: No active malicious behavior observed; risk is contextual

4. Recommendation: Defensive blocking advised due to neighborhood risk, particularly for high-value targets

5. Monitoring Priority: Medium – track for emergence of direct threat indicators

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Prepared by: IPDebrief Intelligence Analysis

Data Source: IPDebrief Threat Intelligence Platform

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