54.39.136.114📋 Copy

# IP Intelligence Briefing: 54.39.136.114

Classification: Moderate Risk | Date: 2026-06-20

Analyst: IPDebrief SOC Intelligence

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## Executive Summary

IP address 54.39.136.114 presents moderate risk (score: 40/100) from OVH cloud infrastructure in Beauharnois, Quebec, Canada. The IP is associated with Ahrefs.net domain services and operates within a high-abuse density subnet (54.39.136.0/24) showing elevated regional threat activity. No active threat indicators or attack campaigns detected, but subnet-level context warrants defensive monitoring.

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## Technical Profile

Network Ownership:

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 54.39.136.0/24
• RIR: ARIN
• Infrastructure Type: CloudCompute / Hosting

Geolocation:

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Accuracy Radius: 3,000 km (consensus-based)

DNS Resolution:

• PTR Record: proxy-ca002-san114.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: Confirmed (1 hostname)
• Email Authentication: SPF/DMARC not configured

Network Classification:

• Cloud Provider: Yes (OVH)
• Hosting: Yes
• CDN/VPN/Proxy: No
• Services: Firewalled / No Services Detected

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## Threat Assessment

Risk Indicators:

• Overall Risk Score: 40 (Moderate)
• Abuse Confidence Score: Not available
• Blacklist Count: 0
• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No

Control Plane Analysis:

• Route Stability: Stable (0 route changes in 30 days)
• DNSSEC: Valid
• RPKI State: Not evaluated
• IRR Consistency: Not evaluated
• DNSBL Listed: 1 of 8 total lists

Campaign Intelligence:

• Campaign Likelihood: None
• Cert Matches: 0
• Banner Matches: 0
• Correlated IPs: 0

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## Subnet Neighborhood Analysis

Subnet: 54.39.136.0/24

• Total Siblings: 256
• Active Siblings: 179
• Threat Siblings: 169
• Abuse Density Classification: High Abuse
• Inherited Risk: 26

Risk Distribution Among Neighbors:

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

*Note: Subnet shows elevated abuse density (0.6602) with significant portion of active IPs flagged as threats. This indicates shared infrastructure hosting multiple entities with varying risk profiles.*

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## Historical Observations

Total Observations: 25

Key Historical Signals:

• 2026-06-20: DNS resolution to ahrefs.net confirmed (confidence: 0.80)
• 2026-06-20: Control plane operator score: 0.4783 (label: Basic)
• 2026-06-15: Subnet abuse density classification: high_abuse (confidence: 0.75)

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence Days: 0
• Is Persistently Malicious: No
• Threat Observation Count: 1

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## Recommended Security Actions

Based on risk profile analysis, the following defensive measures are recommended:

Immediate Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 54.39.136.114 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.136.114 drop

# nginx

deny 54.39.136.114;

```

WAF Configuration:

• Cloudflare WAF: Block with expression `ip.src eq 54.39.136.114`
• AWS WAF: Add IP 54.39.136.114/32 to allowed blocks list

Assessment: No additional specific recommendations beyond IP blocking. The IP shows no active malicious indicators but exists within a high-abuse subnet environment.

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## Intelligence Notes

1. Infrastructure Context: IP belongs to OVH cloud hosting infrastructure with legitimate Ahrefs.net domain association. Risk is elevated primarily due to subnet-level abuse patterns rather than individual IP malicious activity.

2. Monitoring Priority: Medium. Subnet shows 169 threat-sibling IPs among 179 active addresses. Consider implementing subnet-level monitoring rules for 54.39.136.0/24.

3. Action Threshold: Current risk score (40) does not indicate immediate threat, but subnet context suggests defensive posture is warranted.

4. Recommendation: Block IP at perimeter. Monitor subnet for correlated activity patterns. Reassess if additional threat indicators emerge.

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*Report generated by IPDebrief Intelligence Platform. All data derived from live IP reputation and threat intelligence feeds.*

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